TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

These TS 6th Class Science Important Questions 2nd Lesson Playing with Magnets serves as a valuable tool for students to prioritize their studying and revision efforts.

TS 6th Class Science Important Questions 2nd Lesson Playing with Magnets

I. Conceptual Understanding :

Question 1.
What is a magnet ?
Answer:
The substance which holds or attracts other substance naturally is called a magnet.

Question 2.
Give two examples of magnetic material.
Answer:
Iron, cobalt, magnetite etc.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 3.
Explain the discovery of the story of the magnet.
Answer:

  1. Around 2500 years ago, a shephered named Magnus used to take his sheep in the hills for grazing.
  2. He used to carry an iron cap stick to control the sheep.
  3. One day, on the way towards the stream at the site of grazing, he felt that his iron cap stick was stuck to the bottom of the water.
  4. He found the stone that stuck his stick. It is called lode stone.
  5. It is a natural magnet and possesses the property of attracting iron. Since then the stone is called “Magnet”.

Question 4.
What are magnetic materials and non – magnetic materials ? Give ex¬amples.
Answer:

  1. The materials that are attracted by magnets are called magnetic materials. Eg : Iron, cobalt, magentite etc.
  2. The materials that are not attracted by magnets are called non – magnetic materials.
    Eg : Plastic, paper, cloth etc.

Question 5.
What is meant by the directional property of the magnet ?
(or)
What directions does a freely suspended bar magnet show ?
Answer:
Magnet always comes to rest in the North – South direction. One end of the magnet which points towards north is called north pole. The other end of the magnet which points towards the south is called south pole. This is the directional property of magnet.

Question 6.
Describe the structure (construction) of magnetic compass ? Write its uses.
Answer:

  1. A compass is usually a small box with a glass covering on it.
  2. A magnetised needle is pivoted inside the box in such a way that it can rotate freely.
  3. The compass also has a dial with directions marked on it.
  4. The needle in the compass indicates the North-South direction when it comes to rest.
  5. Both ends of the needle are painted in different colours to specify the North-South directions.

Uses:

  1. A compass is used to find directions.
  2. It is mostly used in ships and aeroplanes.
  3. Mountaineers and army people also carry a compass with them to avoid confusion over unknown area.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 7.
Observe the following table. Write which are magnetic or non – magnetic materials in the relevant column.
Answer:
Plastic, iron, wood, gold.

MaterialMagnetic/non -magnetic
PlasticNon – magnetic
IronMagnetic
WoodNon – magnetic
GoldNon – magnetic

Question 8.
Which instrument is used to find the directions ?:
Answer:
Bar magnet.

Question 9.
What is magnetic induction ?
Answer:
Magnetic property possessed by a magnetic substance due to the presence of a magnet near to it, is called magnetic induction.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 10.
What do the letters denote in magnetic compass ?
Answer:
The letter N that is indicated at one end of the compass shows north pole. The letter that is indicated at another end shows south pole.

II. Asking Questions and Making Hypothesis :

Question 11.
Find out the following material attracted by magnets or not.
(a) nail,
(b) knife,
(c) steel,
(d) blade,
(e) pen

Name of the objectMaterial of which the object is madeAttracted by magnet yes / no
jump clipironyes

Answer:
The above given material is tested with the magnet and the results are taken as follows.

Name of the objectMaterial of which the object is madeAttracted by magnet yes / no
1) nailironyes
2) knifesteelno
3) steelsteelno
4) bladeironyes
5) penplasticno

Question 12.
Prepare three analytical questions on
(1) Magnetic induction
(2) Magnetic property
Answer:

  1. Magnetic induction :
    • What is magnetic induction ?
    • How can we use magnetic induction in our daily life?
    • Conduct an experiment on magnetic induction.
  2. Magnetic property:
    • Define magnetic property.
    • Can we find out magnetic property in the bar magnet?
    • Write the nature of magnetic property.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 13.
What questions will you ask your teacher about uses of magnet ?
Answer:

  1. How are magnets useful ?
  2. Where do we use magnets ?
  3. Which places are suitable to use magnets ?

Question 14.
What would happen if magnets do not have poles ?
Answer:

  1. If magnets do not have poles it will be impossible to find the North – South directions of the earth.
  2. We cannot magnetise any magnetic material properly.

Question 15.
What are the problems to be seen if there are no magnets ?
Answer:
The following problems arise due to absence of magnets :

  1. We cannot construct a compass.
  2. Cranes and lifts cannot gain extra strength for working properly.
  3. It will be impossible to frame automatic closing doors.
  4. It will be difficult to find the North – South directions of the earth.
  5. We cannot see magnetic dependent toys.

Question 16.
To know about magnets in detail what questions will you ask ?
Answer:

  1. Where do we see natural magnets ?
  2. Why do only some substances show magnetic property ?
  3. What is the importance of magnetic substances ?
  4. Can’t we create magnetism in all the substances ?
  5. What are the uses of magnets ?

III. Experimentation and Field Investigation :

Question 17.
How can you separate iron filings from soil ?
Answer:
Aim : To separate iron filings from soil.

Procedure : A bar magnet is rolled in the soil in the school ground for some time. Then it is pulled out.

Observation : It is observed that the dark particles of soil are sticking to the magnet.

Result: The dark particles are collected in a sheet of paper. They are called iron filings.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 18.
If an iron piece is given to you, how do you make it as a magnet ?
(Or) :
How can you make your own magnet with simple material ?
(Or)
What are the cheapest and simple material to prepare a magnet ? Write the procedure of making it.
(Or)
Explain the experiment, method and observations of magnetic force/ inspiration.

Write an hypothesis when the edge of a nail is rubbed with the pole of bar magnet.
Answer:
Aim: To make a magnet with simple material.

Required material: Iron nail, bar magnet, table etc.

Procedure:

  1. Iron nail is taken and kept on a table.
  2. A bar magnet is taken and one of its poles is placed near one edge of the nail.
  3. Without lifting the bar magnet it is moved along the length of the iron nail till it reached the other end.
  4. Then the bar magnet is lifted and brought to the first end of the nail. It is moved along the length again.
  5. Magnet is taken among some iron filings or alpins and brought close to the nail

Observation: The iron filings or alpins get attracted by the nail.

Result: Thus making own magnet is a success by using nail.

Question 19.
How can you conclude that every bar magnet has two ends, (or) Explain the procedure and observations in the experiment knowing magnetic poles position.
Answer:
Aim : To conclude that every bar has two ends.

Apparatus : Sheet of paper, iron filings, bar magnet.

Procedure : Certain amount of iron filings are placed on the white paper. A bar magnet is placed below the sheet.

Observation : It is observed that the uniformly spread iron filings tried to concentrate at two points of the paper sheet at some distance. We found some scattered iron filings between these two points whereas the iron filings are mostly concentrated on the two ends of the magnet.

Inference: The ends of the bar magnet attract more iron filings than the middle part of the magnet.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 20.
Find out the directions with a bar magnet, (or) Explain the experiment to know the directions with the help of bar magnet with the precautions.
Answer:

  1. A bar magnet is suspended freely with the help of a thread tied around its centre.
  2. It is noticed that the magnet finally takes a position in the North – South direction.
  3. Mark the end that points towards the North with same colour. Precautions : We should see that the magnet should be suspended with the help of a thread.

Question 21.
What is the magentic induction ? Describe a simple experiment to show magnetic induction, (or) Explain magnetic induction.
Answer:
Magnetic property possessed by a magnetic substance due to the presence of a magnet near it, is called magnetic induction. Experiment to show magnetic induction :

  1. One safety pin is taken and brought close to one pole of a bar magnet.
  2. It is observed that the safety pin gets attached to the magnet.
  3. Then an alpin is brought close to the magnet.
  4. It is observed that an alpin gets attached to safety pin.
  5. We noticed that the safety pin acts as a magnet. Magnetic property is induced in safety pin due to the bar magnet.

V. Communication through Drawing and Model Making :

Question 22.
Which property of magnet is explained by this diagram ?
TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets 1
Answer:
First picture shows unlike poles of two bar magnets attract each other. Second picture shows like poles of two bar magnets repel each other.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets

Question 23.
Draw diagrams of
(a) Bar magnet
(b) Ring magnet
(c) Horse shoe magnet,
(d) Disc magnet (or) Draw and name four different types of magnets.
Answer:
TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets 2

Question 24.
Observe the following diagram. What do you find from this ?
Answer:

  1. Freely suspended magnet always shows north and south poles.
  2. One end of the bar magnet shows north pole. The other end of the magnet shows south pole.
  3. This property of magnet is called directional property.

TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets 3

Question 25.
Draw a neat labelled diagram of a magnetic compass.
Answer:
TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets 4

Question 26.
Draw a neat labelled diagram showing the earth magnetism by labelling North – South directions.
Answer:
TS Board 6th Class Science Important Questions 2nd Lesson Playing with Magnets 5

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Regular practice with TS 6th Class Science Bits with Answers 2nd Lesson Playing with Magnets improves students’ confidence and readiness for assessments and examinations.

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 1.
The story of magnet was told by
A) Magnus
B) Hippocrates
C) Aristotle
D) Magenta
Answer:
A) Magnus

Question 2.
Magnusisa
A) Business man
B) Teacher
C) Shepherd
D) Book seller
Answer:
C) Shepherd

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 3.
Example of non-magnetic substance
A) pins
B) eraser
C) nails
D) jump-clips
Answer:
B) eraser

Question 4.
Natural magnet
A) Ring magnet
B) Lode stone
C) Disc magnet
D) Horse shoe magnet
Answer:
B) Lode stone

Question 5.
The strongest magnet currently known:
A) Samarium
B) Neodyminum
C) Ceramium
D) Aluminium
Answer:
B) Neodyminum

Question 6.
The materials that are attracted by magnets are called material
A) magnetic
B) non-magnetic
C) ferro – magnetic
D) water magnetic
Answer:
C) ferro – magnetic

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 7.
Identify magnetic substances
1. nail
2. aluminium
3. door locks
4. bolt
A) 1 & 2
B) 2 & 3
C) 1,2,3 & 4
D) 3 & 4
Answer:
C) 1,2,3 & 4

Question 8.
Magnet has poles.
A) 4
B) 1
C) 0
D) 2
Answer:
D) 2

Question 9.
A freely suspended magnet rests in
(Or)
The sides which show the free-state magnetic bar
A) East-West
B) West – South
C) East – North
D) North-South
Answer:
D) North-South

Question 10.
A magnet exhibits property.
A) directional
B) addition
C) rectilinear
D) All the above
Answer:
A) directional

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 11.
Read the following paragraph.
Magnets always come to rest in the North-South direction. In each case, the marked end points towards North.This end is known as North pole of the magnet.The other end which points towards the south is known as south pole of the magnet. This property of magnets is called ‘directional property’. It is exhibited only by magents. We use this property to make the ‘magnetic compass’. According to above information on the basis of directional property principle is made.
A) Index
B) Map
C) Magnetic compass
D) Globe
Answer:
C) Magnetic compass

Question 12.
We find more attractive force in the magnet at
A) whole magnet
B) upside
C) poles
D) in the middle
Answer:
C) poles

Question 13.
If an object is attracted by both the poles of a bar magnet and not repelled by any pole then you can say
A) that is a magnet and a magnetic substance
B) that is a magnet but not a magnetic substance
C) that is not a magnet, hut a magnetic substance
D) that is not a magnet, but not a magnetic substance
Answer:
C) that is not a magnet, hut a magnetic substance

Question 14.
A compass is used to find
A) height
B) length
C) direction
D) none of these
Answer:
C) direction

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 15.
Like poles of magnet
A) attract
B) repel
C) not attract
D) none of the above
Answer:
B) repel

Question 16.
Magnets unlike poles
A) attract
B) repel
C) not attract
D) not repel
Answer:
A) attract

Question 17.
The earth possesses magnetic property which acts upon the
A) Round magnet
B) ‘U’ shaped magnet
C) Cylindrical magnet
D) Bar magnet
Answer:
D) Bar magnet

Question 18.
The magnetic property of the earth is called force.
A) Mechanical
B) Gravitational
C) Electrical
D) Frictional
Answer:
B) Gravitational

Question 19.
A freely suspended bar magnet shows and directions.
A) South, East
B) North, South
C) East, West
D) North, East
Answer:
B) North, South

Question 20.
Read the given statements
a) A bar magnet has two poles.
b) Bar magnet always shows North-West directions.
A) Both a and b statement are true
B) a is true b is false
C) Both a and b are false
D) a is false b is true
Answer:
B) a is true b is false

Question 21.
Match the following.
i) Compass — a. Magnetic material
ii) Plastic — b. Non – magnetic material
iii) Iron nail — c. Magnetic directional property
A) i-a, ii-b, iii-c
B) i-b, ii-c, iii-a
C) i-a, ii-c, iii-b
D) i-c, ii-b, iii-a
Answer:
D) i-c, ii-b, iii-a

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 22.
Guess what happens, when the bar magnet is cut Into 4 pieces
A) Each piece is like a complete magnet
B) Some pieces show only north pole
C) Some pieces show only south pole
D) All pieces lose magnetic property
Answer:
A) Each piece is like a complete magnet

Question 23.
Observe the following statements and choose the right choice
a) Like poles repel
b) Unlike poles attract
A) a and b correct
B) a wrong and b correct
C) a correct and b wrong
D) a and b wrong
Answer:
A) a and b correct

Question 24.
If earth loses Its capacity of magnetism the consequence will be ()
A) losing atmosphere
B) gaining power
C) generating energy
D) losing gravitational force
Answer:
D) losing gravitational force

Question 25.
Magnetic property possessed by a non-magnetic substance due to the presence of a magnet is called
A) Magnetic industry
B) Magnetic approach
C) Magnetic induction
D) Magnetic test
Answer:
C) Magnetic induction

Question 26.
Which of the following sentences is correct?
A) Like poles of magnet are attractive
B) Like poles of magnet are repulsive
C) Unlike poles of magnet are repulsive
D) Unlike poles of magnet do not show any reaction
Answer:
B) Like poles of magnet are repulsive

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 27.
The property to identify the magnet is
A) Attraction
B) Repulsion
C) Attraction – repulsion
D) None
Answer:
C) Attraction – repulsion

Question 28.
Find the odd one out regarding magnetic material.
A) Iron rod
B) Cobalt
C) Rubber
D) Lode stone
Answer:
C) Rubber

Question 29.
One of the following is not magnetic meterial.
A) Paper
B) Wood
C) Cement stone
D) Lode stone
Answer:
D) Lode stone

Question 30.
Find the odd one out regarding magnetic substances.
A) Plastic
B) Paper
C) Wood
D) Iron
Answer:
D) Iron

Question 31.
What question will you pose on earth’s magentic directional property?
A) How does earth show magnetic directional property?
B) Where are bar magnets on the earth?
C) How do we know north and south directions of earth?
D) How many directions are there?
Answer:
A) How does earth show magnetic directional property?

Question 32.
You have made own magnetic compass. In order to make the cork float on water surface, what is added to the water?
A) sand
B) nails
C) a little amount of detergent
D) oil
Answer:
C) a little amount of detergent

Question 33.
Precaution to be taken while magnetising a needle
A) magnet is moved in any direction
B) magnet is moved in one direction
C) magnet is unmoved
D) magnet is moved in both direction
Answer:
B) magnet is moved in one direction

Question 34.
What materials do you use for showing magnetic induction?
A) alpin
B) safety pin
C) bar magnet
D) All
Answer:
D) All

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 35.
What would you do if you want to magnetise the nail? Pick up correct precaution.
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 1
A) Move the magnet on the nail roughly
B) Move the magnet on the nail slowly ‘
C) Move the magnet on the nail in one direction
D) Don’t move magnet
Answer:
C) Move the magnet on the nail in one direction

Question 36.
List out the materials used for making a simple magnetic compass
1. Magnetised needle
2. Bar magnet
3. Disc magnet
4. Water
5. Glass
6. Light cork
A) 1,2,3,4
B) 2,3,4,5
C) 1,3,2,5
D) 4,1,5,6
Answer:
D) 4,1,5,6

Question 37.
Find the correct order of procedure while doing the experiment magnetic induction
1. Safety pin is brought close to magnet
2. Safety pin is brought close to alpine
3. Alpine is brought to safety pin
A) 1, 2, 3
B) 3, 2, 1
C) 2, 3, 1
D) 1, 3, 2
Answer:
D) 1, 3, 2

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 38.
Observe the table given below and answer the questions.

ObjectMaterialAttracted by magnet
Jump clipIron?
ScalePlastic?

Net result of the experiment based on the above table.
A) Jump clip – attracted, Scale – attracted
B) Jump clip – not attracted, Scale – not attracted
C) Jump clip – attracted, Scale – not attracted
D) Jump clip – not attracted, Scale – attracted
Answer:
C) Jump clip – attracted, Scale – not attracted

Question 39.
When we forget our route we can find out the direction with the help of
A) Disc magnet
B) Ring magnet
C) Compass
D) Bar magnet
Answer:
C) Compass

Question 40.
What precaution you should take while doing experiment to know magnet’s N-S directions?
A) Two magnets are kept close to each other
B) Suspended magnet is kept close to the one kept on the table
C) Two magnets are kept separately
D) B or C
Answer:
B) Suspended magnet is kept close to the one kept on the table

Question 41.
Earth magnet can be …………. times more powerful than a fridge magnet
A) 20
B) 30
C) 40
D) 50
Answer:
A) 20

Question 42.
Using magnets is seen here
A) Office doors
B) Radio
C) TVs
D) All the above
Answer:
D) All the above

Question 43.
Which of the following are not considered magnetic materials-pen, knife, pen cap, plastic scale, iron nail, iron bar?
A) pen, pen cap, plastic scale
B) pen cap, iron bar
C) iron nail, iron bar, knife
D) plastic scale, iron bar
Answer:
A) pen, pen cap, plastic scale

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Read the following given lines. Answer the question.
Tan object is attracted by one pole of the bar magnet and repeated by its other pole it is a magnet.

Question 44.
A magnet always
A) Attract
B) Repel
C) A and B
D) Only expel
Answer:
C) A and B

Question 45.
Read the table given below and answer the questions

ObservationObject -1Object – 2Object – 3
Changes observed when one substance is brought close to a magnetattractedrepellednot attracted

Which are considered magnets based on the table given?
A) Object 1&3
B) Object 2&3
C) Object 1&2
D) Object 1,2&3
Answer:
C) Object 1&2

Question 46.
This scientist used lode stone in battles.
A) Archimedis
B) Robert Hooke
C) Miyoshi
D) Faraday
Answer:
A) Archimedis

Question 47.
The picture shows …….. magnet
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 2
A) Horse shoe
B) Round
C) Bar
D) Disc
Answer:
A) Horse shoe

Question 48.
Magnet attracts
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 3
Answer:
D.

Question 49.
Identify the given diagram
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 4
A) Bar magnet
B) Horse shoe magnet
C) Ring magnet
D) Disc magnet
Answer:
A) Bar magnet

Question 50.
Identify the type of magnet in the given diagram
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 5
A) Disc magnet
B) Bar magnet
C) East
D) Ring magnet
Answer:
D) Ring magnet

Question 51.
What is missing in the given diagram?
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 6
A) North pole
B) South pole
C) East pole
D) West pole
Answer:
B) South pole

Question 52.
What is the purpose of the given experiment?
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 7
A) Finding directions with a bar magnet
B) Finding the directional property of earth
C) Constructing magnetic campass
D) Attracting capacity of poles of a bar magnet
Answer:
A) Finding directions with a bar magnet

Question 53.
Identify the given diagram………..
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 8
A) Bar magnet
B) Magnetic compass
C) Wall clock
D) Water clock
Answer:
B) Magnetic compass

Question 54.
In the given diagram the like poles …………….
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 9
A) Attracts
B) Repeles
C) Do not respond
D) None of the above
Answer:
B) Repeles

Question 55.
See the given picture. What does it represent?
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 10
A) Magnetic compass
B) Magnetic induction
C) Magnetic inspiration
D) A or C
Answer:
A) Magnetic compass

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 56.
In the adjacent diagram, missed one. [ ]
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 11
A) South
B) North
C) East
D) West
Answer:
A) South

Question 57.
Identify the north and south poles of the second bar magnet shown in the figure.
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 12
A) N-N
B) S-S
C) N-S
D) S-N
Answer:
C) N-S

Question 58.
The earth is a gigantic electro magnetic because of its
A) minerals
B) water in oceans
C) vegetation
D) current in liquid centre of earth
Answer:
D) current in liquid centre of earth

Question 59.
The given picture tells
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 13
A) Magentic induction of the earth
B) Magnetic directional property of the earth
C) Magentic inspiration of the earth
D) Earth as a non-magnet
Answer:
B) Magnetic directional property of the earth

Question 60.
The given picture shows
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 14
A) Poles of a horseshoe magnet
B) Poles of a ring magnet
C) Poles of a bar magnet
D) Pole of a disc magnet
Answer:
C) Poles of a bar magnet

Question 61.
The given picture of magnet and nail explains
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 15
A) Magnetising the substance
B) Magnetising the air
C) Magnetic induction
D) All the above
Answer:
A) Magnetising the substance

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 62.
The given picture shows….
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 16
A) Magnetism
B) Non magnetism
C) Magnetic induction
D) Non magnetic material
Answer:
C) Magnetic induction

Question 63.
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 17
What will be the poles of 2nd magnet to attract?
TS 6th Class Science Bits 2nd Lesson Playing with Magnets 18
Answer:
B.

Question 64.
Sailors and travellers use this for direction
A) Bar magnet
B) Compass
C) Needle
D) Radio
Answer:
B) Compass

Question 65.
What activity can you do with bar magnet, alpin and saftey pin?
A) Magnetic compass
B) Magnetic property
C) Magnetic direction
D) Magnetic induction
Answer:
D) Magnetic induction

Question 66.
The wondering magnetic object in the universe
A) Ball
B) Moon
C) Earth
D) Air
Answer:
C) Earth

Question 67.
Through usage of magnet for magnetizing substance results in
A) decreasing magnetism
B) increase in magnetism
C) no change in magnetism
D) magnet melts
Answer:
A) decreasing magnetism

TS 6th Class Science Bits 2nd Lesson Playing with Magnets

Question 68.
Because of magnetism we are benefited in the following industries
A) Jewellery purchase
B) Dose and open the doors
C) Radio transmission
D) All the above
Answer:
D) All the above

TS 8th Class English Guide Unit 1C A Letter to a Friend

Telangana SCERT 8th Class English Guide Telangana State Unit 1C A Letter to a Friend Textbook Questions and Answers.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Answer the following questions.

Question 1.
How did Suresh and Ramesh spend their childhood ?
Answer:
Suresh and Ramesh spent their childhood playing in the garden, in the moon light, swimming in the local tank in their village and listening to fairy tales told by their grand parents. They used to play gilli-danda, hide and seek and kabaddi.

Question 2.
Why did Ramesh’s family move to the city ?
Answer:
Ramesh’s family moved to the city because he and his wife got jobs in the city.

Question 3.
What change did you observe in Ramesh ?
Answer:
City life made Ramesh’s life very busy. His life has been mechanised. He has forgotten his family also. He hardly finds time to spend with his family. He works with computers, thinks like a computer and lives like a computer. The world remains unheeded. He feels life is very disgusting.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 4.
Do you think Ramesh is happy in the city? Why ?
Answer:
No, I don’t think Ramesh is happy in the city. He wrote a letter to his friend Suresh regretting his busy city life and recollecting his village’s happy life. Ramesh is working in a software company in Hyderabad as a Computer Programmer. He is married and has a child. He hardly finds time to spend with his family members.

Question 5.
What made Ramesh write to Suresh ?
Answer:
A vexed busy city life made Ramesh write to his friend Suresh.
He lost the sweet moments he had spent in his village along with his friend Suresh. The city life is very disgusting. The world remains unheeded. This made Ramesh remember and share their childhood days with his friend. Ramesh wrote to Suresh because he was unable to meet Suresh during his visit to Hyderabad last week.

Project Work:

Question.
Observe any five families in your neighbourhood and draw your conclusions, advantages and disadvantages of living in a joint / nuclear family.
Answer:
I observed five families in my neighbourhood. I came to the conclusion that there are many advantages of living in a joint family instead of living in a nuclear family.
In a joint family there is good support and understanding among all the family members to help one another.
To meet both ends meet, every family member can be a part of the family earnings. They can share rights and responsibilities, so as to improve themselves and their family.
In a nuclear family, if any trouble arises there is none to support. There is no moral support. One has to fight the problems alone. One loses the sweetness of human relations, the care and love.

A Letter to A Friend Summary in English

Ramesh wrote to his friend Suresh that he was unable to meet him when Suresh visited Hyderabad the previous week. He expressed his joy recollecting how they enjoyed in Manikonda village during their childhood days. He informed Suresh that he was working as a computer programmer in a software company in Hyderabad. His wife was working as a system analyst. They used to keep their child at the baby care centre. He said that they were disgusted with their work. They were living like frogs in the well. He recollected his school days. He also recollected his uncle bringing toys and aunt giving new dress to him for Dasara.
He felt sad that he missed the taste of real life.

Glossary:

1. grating : making a rattling sound
2. wrinkled : folded
3. disgusting : disliking strongly
4. unheeded : did not pay attention

TS 8th Class English Guide Unit 1C A Letter to a Friend

Section – A : Reading Comprehension :

Read the following passage from ‘A Letter to a Friend’.
How happy we were in our school! We used to sit in the same row, did all the work together and took part in the events. I remember how Padmanabhaiah Sir, our class teacher,appreciated us when we got the first prize in District Science Fair. I remember how we went on a picnic to Koil Sagar. There we went boating. Our tour to Srisailam was memorable. Still I remember the green hills full of trees that almost touched the sky!

I remember the roaring of the Krishna River at the dam. There is nothing here! I wonder at my child’s silence. He always sits in front of the computer and plays games, never caring for anyone. I remember the happy moments when our uncle visited us. He brought toys and fruit for us. Our aunt brought me a new dress for Dasara. How we enjoyed Deepavali! Still I hear the sound of crackers, I can see the rockets flying into the sky making the night full of light! Where are those days? My child doesn’t know his uncle or aunt. For him, uncle and neighbour are the same.

Sometimes I think of our childhood days. I think of grandparents, uncles, brothers, sisters …….We missed them. We missed the joy of the family. We missed their company. We are missing many things in this busy life.

Suresh, I don’t know where those gardens have gone, those fairy tales, those fruit, those words of love and affection. We have lost our real life in this unreal world.

Anyhow I am happy that I have found time to write to you. Please come to me. Let’s remember our childhood days of joy.

(Q. 1 – 5) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 5 × 1 = 5 M

Question 1.
Who does ‘we’ refer to in the opening line? ( )
A) Kumar and Shiva
B) Raghu and Mahesh
C) Suresh and Naresh
D) Suresh and Ramesh
Answer :
D) Suresh and Ramesh

Question 2.
Who was Padmanabhaiah?
A) The headmaster
B) The incharge headmaster
C) A clerk
D) The class teacher of the two friends
Answer :
D) The class teacher of the two friends

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 3.
In the line ‘there is nothing here!’ ‘here’ refers to ……..
A) A city
B) A village
C) A town
D) A hamlet
Answer :
A) A city

Question 4.
Deepavali is ………..
A) The festival of colours
B) The festival of crackers
C) The festival of lights
D) The festival of the children
Answer :
C) The festival of lights

Question 5.
Who wrote the letter to whom ?
A) Ramesh wrote the letter to Suresh.
B) Suresh wrote the letter to Ramesh.
C) The teacher wrote the letter to the students
D) Padmanabhaiah wrote the letter to Naresh.
Answer :
A) Ramesh wrote the letter to Suresh.

(Q.6 – 10) Answer the following questions in one or two sentences in your own words. 5 × 2 = 10 M

Question 6.
How did Suresh and Ramesh spend their childhood?
Answer :
Suresh and Ramesh spent their time playing together in their garden happily. They played gilli-danda, hide and seek and kabaddi. They listened to fairy tales narrated by their grandfather. They went for swimming in their local tank every Sunday.

Question 7.
Why did Ramesh’s family move to the city ?
Answer :
Ramesh was educated. He went to the city in search of a well-paid job. So, Ramesh’s family moved to the city.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 8.
What change did you observe in Ramesh ?
Answer :
During his childhood, Ramesh would spend his time playing in the garden and open spaces. But now his life was restricted to the apartment where he had no room to play.

Question 9.
Do you think Ramesh is happy in the city ? Why ?
Answer :
No, I don’t think Ramesh is happy in the city. The reason is, he is leading a very busy life there. He missed the joy of the family.

Question 10.
What made Ramesh write to Suresh ?
Answer :
When Suresh came to the city, Ramesh was unable to meet him because he had a meeting in his office. So, Ramesh wanted to apologise to his friend for his inability to meet him. This made Ramesh write to Suresh.

Read the following poem.

The sun descending in the west,
The evening star does shine;
The birds are silent in their nest.
And I must seek for mine.
The moon like a flower
In heaven’s high bower,
With silent delight
Sits and smiles on the night.
Farewell, green fields and happy grove,
Where flocks have took delight:
Where lambs have nibbled, silent move
The feet of angels bright;

Unseen they pour blessing
And joy without ceasing
On each bud and blossom,
And each sleeping bosom.
They look in every thoughtless nest
Where birds are covered warm;
They visit caves of every beast,
To keep them all from harm:
If they see any weeping
That should have been sleeping,
They pour sleep on their head,
And sit down by their bed.

(Q. 11 – 12) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 2 × 1 = 2 M

Question 11.
The evening star rises when ……..
A) the birds leave their nests
B) it is midnight
C) it is dawn
D) the sun descends in the west
Answer :
D) the sun descends in the west

Question 12.
Here, ‘bower’ represents ………..
A) A potted plant
B) A framework that supports climbing plants
C) A bouquet of flowers
D) A flower vase
Answer :
C) A bouquet of flowers

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Q. 13 – 16) Answer the following questions in one or two sentences in your own words. 4 × 2 = 8 M

Question 13.
What does the poet compare the moon to?
Answer :
The poet compares the moon to a flower.

Question 14.
Why do angels come down to the earth?
Answer :
The angels come down to the earth to give blessings and joy.

Question 15.
Why is the birds’ nest described as thoughtless?
Answer :
The birds’ nest is described as thoughtless because the occupants are asleep without any care.

Question 16.
Identify the figure of speech used in the line ‘In heaven’s high bower’.
Answer :
The figure of speech used in the line ‘In heaven’s high bower’ is metaphor.

Section- B : Vocabulary and Grammar :

(Q. 17 – 21) Read the following passage focusing on the parts that are underlined and answer the questions given at the end. Write the answers in your booklet. 5 × 1 = 5 M

Laxman was a hardworking washerman ………. (17). His day always ………… (18) began early. First, he cleaned up his little shack ……….. (19), then he fed the stray ……. (20) dog he had picked up from the street. After that, he have prepared ……….. (21) a small meal for himself.

Question 17.
The plural form of the underlined word is …………
A) men
B) washermen
C) washermens
D) washermans
Answer :
B) washermen

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 18.
The antonym of the underlined word is …………
A) ever
B) never
C) rarely
D) frequently
Answer :
B) never

Question 19.
The meaning of the underlined word is ………….
A) a palace
B) a building
C) a garden
D) a small hut
Answer :
D) a small hut

Question 20.
What part of speech is the underlined word?
A) adjective
B) pronoun
C) noun
D) adverb
Answer :
A) adjective

Question 21.
Replace the underlined part with its correct from.
A) prepare
B) prepares
C) prepared
D) has prepared
Answer :
C) prepared

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Q. 22 – 26) Complete the following passage choosing right words from those given below it. Each blank is numbered, and for each blank four choices (A), (B), (C) and (D) are given. Choose the correct answer from these choices and write (A), (B), (C) or (D) in your answer booklet. 5 × 1 = 5 M

Whenever you go trekking or walking ……… (22) a marsh, remember to watch ………… (23) for leeches. Leeches look ………… (24) earthworms but they are a nuisance. They cling ……….. (25) the body of a human being or an animal and (26) blood from it.

22. A) on
B) in
C) with
D) through
Answer :
D) through

23. A) at
B) out
C) but
D) closely
Answer :
B) out

24. A) as
B) like
C) at
D) into
Answer :
B) like

TS 8th Class English Guide Unit 1C A Letter to a Friend

25. A) to
B) onto
C) on
D) at
Answer :
B) onto

26. A) take
B) absorb
C) suck
D) release
Answer :
C) suck

(Q. 27 – 31) Read the following passage. Five sentences are numbered. Each numbered sentence has an error. Find the error and write the correct sentences in your answer booklet. 5 × 1 = 5 M

27. ‘Who is that?’ Amma say again. ‘Who is that in a car ?’
28. ‘It’s me,’ Gopi said. ‘I had to come from Thiruvananthapuram.
29. I thought I should drop into seen you, Amma:’
30. ‘What is your Amma? What is her name?
31. Where does she lives ? Is it far from here?”‘No, it is quite near.’
Answer :
27. ‘Who is that ?’ Amma said again.
28. I had to come to Tiruvananthapuram.
29. I thought I should drop in to see you.
30. Who is your Amma?
31. Where does she live?

Section – C : Conventions of Writing :

(Q. 32) Read the following passage carefully and supply the punctuation marks (. , ? ” “) and capital letters, wherever necessary. Also correct the spelling of the underlined word. 5 M
so boss, he whispered. They acepted him placidly and he fetched some hay for each cow and then got the milking pail and the big milk cans
Answer :
“So, boss,” he whispered. They accepted him placidly and he fetched some hay for each cow and then got the milking pail and the big milk cans.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Section – D : Creative Writing :
(Question – 33) :

A) Observe the following picture and write 10-12 sentences about it. 12 M

TS 8th Class English Guide Unit 1C A Letter to a Friend 1

Answer :
A young boy with his Mother at Market :
This is a picture of a fruit market. There are two fruit stalls. A young boy is at the first fruit stall. It is filled with fresh pineapples. The shopkeeper is involved in business. A balance is hanging down in the front of the stall. It seems that the lady bought some fruit and is walking towards the next stall asking her son to collect the remaining amount from the vendor. He is now collecting the same from the vendor. The second stall has mangoes and a balance to weigh them. The shopkeeper of the next stall is eagerly waiting for the customer. He is expecting that the lady will make a purchase.

(OR)

B) The school going teenagers of today can be seen talking and playing on cell phones for hours together in buses, on bikes while riding, at colleges, schools, on roads etc. Thus, students are wasting their precious time and neglecting their studies and sometimes even risking their lives and others’ lives also due to accidents.
You feel it is a bad habit.
Now, write a letter to the editor of the newspaper on the disadvantages of unnecessary use of mobiles. Give a few suggestions on controlling the usage of mobiles. You may use the following hints.

  • parents supervision should be there.
  • time limit
  • schools and colleges should be treated as ‘no mobile zones’.
  • heavy fine on use of mobiles on school / college campuses.

Answer :
XXXX,
D. No. 4-9,
Vanasthalipuram,
Hyderabad.
Dt: XX.XX.XXXX
The Editor,
The Hans India,
Hyderabad.
Sub : Disadvantages of unnecessary use of mobiles by students.
Sir,
I am a resident of Vanasthalipuram, Hyderabad. I am a regular reader of your august newspaper. Through your reputed daily, I would like to draw the attention of the authorities concerned towards disadvantages of unnecessary use of mobiles by students.

Today’s school going students are wasting their precious time in talking and playing games on cell phones for hours together in buses, on bikes while riding, at colleges, schools, on roads etc. It is due to the mobiles that students are neglecting their studies and sometimes even risking their lives and others’ lives also in accidents.

Parents should supervise their children properly and guide them towards the right path. Limited time should be spent on using mobiles. Cell phones should be banned at schools and colleges. In case a student uses a mobile in school or college campus, he or she should be fined heavily.

I hope this column would awaken the students and motivate them towards their dream. Thanking you, Yours truly,
Prakash.

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Question – 34) :

A. Imagine you are the headmaster of Z. P. High School. Independence Day is coming up. Now, prepare a notice on the occasion of this historic event for your school notice board. 8 M
Answer :

Z. P. HIGH SCHOOL, RAJAPETA
NOTICE

Date : XX.XX.XXXX

INDEPENDENCE DAY CELEBRATIONS

All the staff members and students are hereby informed that the 68thIndependence Day celebrations begin at our school at 7: 00 a . m. on 15 th August.
The programme is as follows :
1. Students assemble at 7:00 a.m.
2. Flag hoisting at 7: 15 a.m.
(by Sri Venkaiah, a veteran freedom fighter)
3. Speeches by students and teachers
4. Prize distribution
5. Cultural activities
6. Sweet distribution
7. Speech by the Chief Guest
8. Vote of Thanks by
Mr. Rajesh, English teacher

Sd/-
Sundhar
SUNDAR
(Headmaster)

(OR)

B. Design a poster highlighting preventive measures of earthquakes.
Make use of the following points in your answer:

  • What the poster is about (topic)
  • Layout
  • Who made the poster

Answer :

Earthquakes
The Deadliest Hidden Enemies of Man.

You cannot stop them; You cannot foretell them
But when they come, what should be done?

Take refuge in a corner of the room where you are.

  • Keep away from a building if you are outside in open.
  • If you are sitting at a table, immediately get under it.
  • Keep away from electrical poles or live wires.

Issued in public interest by : Lion Club, Sardar Patel Road, Bathinda.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Additional Exercises :

Section – A : Reading Comprehension
(Questions 1 – 10)

EXERCISE – 1

Read the following passage from “The Tattered Blanket”.

‘Do you know my son, Gopi ?’ Amma asked him. ‘He is in Delhi… a Government officer. He has Kesariyogam…. He draws a salary of two thousand five hundred rupees. Do you know him ?
“Yes, I know him.”
“Tell him to send me a blanket. There is a cold mist in the mornings. If I catch cold it doesn’t leave me for a long time. Tell him to send a blanket, won’t you ? A red one. I had a blanket, the one he brought for me when he was studying in Madras. It is all tattered now, just a ball of knotted yarn. Tell him to send me a red blanket, will you ?” ‘I’ll tell him’, he nodded.
‘Please don’t forget to tell him. The mist is not good for me. I think I’ll stretch myself out for a bit. I have been sitting too long in the armchair. I have a pain in the neck’.
Gopi’s sister put Amma to bed and came back to the veranda.
‘You didn’t come to see Amma, did you ?’
‘Delhi is too expensive. You know I have four children to look after now. I can’t make both ends meet with my salary. And one has to keep up one’s status. It will be a great help if I can raise some money by selling my share of the family property. I came to talk it over with you.’
‘You’ll sell your land and go away with the money. I know you won’t come here anymore after that.’
‘Don’t say that. I’ll come when I get time.’
‘Your time!’

(Q. 1 – 5) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 5 × 1 = 5 M

Question 1.
Who serves as a Government officer in Delhi ?
A) Amma
B) Gopi
C) Kamala
D) Vimala
Answer :
B) Gopi

Question 2.
Who is ‘I’ in the line – “I’ll come when ‘I’ get time’?
A) Gopi
B) Ramesh
C) Kamala
D) Suresh
Answer :
A) Gopi

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 3.
‘Mist’ means ………
A) Ice
B) Snow
C) Fog
D) Rain
Answer :
C) Fog

Question 4.
What type of son is Gopi?
A) An irresponsible son
B) A responsible son
C) An ideal son
D) A true son
Answer :
A) An irresponsible son

Question 5.
The cost of living in Delhi is ………
A) expensive
B) very expensive
C) so expensive
D) too expensive
Answer :
D) too expensive

(Q.6 – 10) Answer the following questions in one or two sentences in your own words. 5 × 2 = 10 M

Question 6.
The mother could not remember Gopi. Do you think Gopi remembered his mother? What does it suggest ?
Answer :
Gopi did not remember his mother. He came to see her after five years. The purpose of his visit was to ask his sister to sell his share of property for getting money. It suggests that Gopi wants money but not human relationships.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 7.
Why did Amma want a blanket ?
Answer :
Amma wanted a blanket because there was a cold mist in the mornings. Moreover, her old blanket was tattered.

Question 8.
Explain the expression ‘make both ends meet’.
Answer :
The expression ‘make both ends meet’ means to earn just enough money.

Question 9.
Why did Gopi visit his mother ?
Answer :
Gopi visited his mother for his share of property as the cost of living in Delhi was too high. His salary of two thousand five hundred rupees was not enough to take care of his family.

Question 10.
If you were Gopi’s sister, how would you respond to his behaviour?
Answer :
If I were Gopi’s sister, I would express my anger over his selfish attitude. I would never allow him to sell his share of property.

EXERCISE – 2

Read the following passage from “A Letter to a Friend”.
This is Ramesh. I apologise for not meeting you during your visit to Hyderabad last week. Unfortunately, I had a meeting in my office. I remember how we enjoyed our childhood days in Manikonda village. Every day we played together in our garden. Our family was very big. There were twelve members in our family. I remember how we played in the moon light.0ur grandma used to give us fruits and biscuits. Our grandpa used to tell us fairy tales, about the princes, warriors and the village boys…….

Now I am working at Microsoft, a software company, Hyderabad, as a Computer Programmer. I am married and we have a child. My wife works at Dell, Hyderabad as a System Analyst. You know city life is quite busy. We start in the morning; leave our child at the baby care centre and come back in the evening with faded faces. We hardly find time to sit together. How disgusting! We work with computers, think like computers and live like computers. We have forgotten our family.

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Q. 1 – 5) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 5 × 1 = 5 M

Question 1.
Who wrote this letter?
A) Ramesh
B) Paramesh
C) Naresh
D) Suresh
Answer :
A) Ramesh

Question 2.
Who had a meeting?
A) Suresh
B) Lokesh
C) Rajesh
D) Ramesh
Answer :
D) Ramesh

Question 3.
The meaning of the word ‘apologise’ is ………
A) to say thanks
B) to request
C) to say sorry
D) to blame
Answer :
C) to say sorry

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 4.
Ramesh has …….
A) two children
B) one child
C) three children
D) many children
Answer :
B) one child

Question 5.
Where is Ramesh living now?
A) In Delhi
B) In Mumbai
C) In Chennai
D) In Hyderabad
Answer :
D) In Hyderabad

(Q.6 – 10) Answer the following questions in one or two sentences in your own words. 5 × 2 = 10 M

Question 6.
Who is the letter addressed to ?
Answer :
The letter is addressed to Suresh.

Question 7.
How is Ramesh related to Suresh ?
Answer :
Ramesh and Suresh are childhood friends.

Question 8.
Why was Ramesh unable to meet his friend ?
Answer :
Ramesh was unable to meet his friend because he had a meeting in his office.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 9.
How many members are there in Ramesh’s family now ?
Answer :
There are three members in Ramesh’s family now.

Question 10.
What is Ramesh’s wife?
Answer :
Ramesh’s wife works as a System Analyst at Dell, Hyderabad.

EXERCISE – 3

Read the following poem.

I cannot remember my mother, only sometime in the midst of my play a tune seems to hover over my playthings, the tune of some song that she used to hum while rocking my cradle.
I cannot remember my mother, but when in the early autumn morning the smell of the shiuli flowers floats in the air, the scent of the morning service in the temple comes to me as the scent of my mother.
I cannot remember my mother, only when from my bedroom window I send my eyes into the blue of the distant sky, I feel that the stillness of my mother’s gaze on my face has spread all over the sky.
– Rabindranath Tagore

(Q. 1 – 5) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 5 × 1 = 5 M

Question 1.
What did the poet’s mother do while rocking the cradle?
A) Dance
B) Fight
C) Sing with closed lips
D) Cry
Answer :
C) Sing with closed lips

Question 2.
Which season is mentioned in the poem ?
A) Summer
B) Winter
C) spring
D) Autumn
Answer :
D) Autumn

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 3.
Pick out the pair of rhyming words.
A) Mother – gaze
B) my – sky
C) only – on
D) used – cradle
Answer :
B) my – sky

Question 4.
The meaning of the word ‘scent’is
A) Flower
B) Sweet
C) Perfume
D) Unpleasant smell
Answer :
C) Perfume

Question 5.
What floats in the air?
A) Shiuli flowers
B) The scent of the shiuli flowers
C) The scent of the rose flowers
D) The scent of the morning service
Answer :
B) The scent of the shiuli flowers

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Q.6 – 10) Answer the following questions in one or two sentences in your own words. 5 × 2 = 10 M

Question 6.
How does the poet feel the presence of his mother?
Answer :
The poet feels his mother’s presence in whatever he does and wherever he goes. He feels her presence when he is playing and when the scent of the shiuli flowers comes floating in the air. He also feels the stillness of his mother’s gaze when he looks at the blue sky.

Question 7.
What do you understand from the statement – ‘I cannot remember my mother’?
Answer :
The statement – ‘I cannot remember my mother’ tells us that the poet is unable to recall the exact face or the features of his mother because she passed away when the poet was very young.

Question 8.
Does the poem convey sadness? If yes, pick out the suggestive expressions.
Answer :
The poem conveys sadness. The expression – ‘I cannot remember my mother’ repeated in every stanza tells us that the poet is so sad that he does not remember his mother and he misses her a lot.

Question 9.
We all love our mother, don’t we? We love her because of certain qualities. Think and write about her qualities.
Answer :
A mother has unconditional love for her child. She loves her child without expecting anything in return. She is always there to take care of the child and always works for his physical and mental well being. She makes many sacrifices for her child.

Question 10.
Why is the mother great?
Answer :
The mother is great because she works 24 / 7 with no breaks. Her job requires wisdom, intelligence, patience, skill, physical labour and strength.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Additional Exercises :
(Questions 11 – 16)

EXERCISE – 1

Read the following passage.

All the housewives who went to the Kalpatharn supermarket in Bangalore had one great ambition: to be lucky customer who did not have to pay for her shopping. For this was what the notice just inside the entrance promised. It said, “Remember, once a week, one of our customers gets free goods. This may be your lucky day!”

For several weeks Mrs. Batliwala hoped, like many of her friends, to be the lucky customer. Unlike her friends, she never gave up her hope. Her kitchen was full of things which she did not need. Her husband failed to dissuade her. She dreamed of the day when the manager of the super market would approach her and say : “Madam, this is your lucky day. Everything in the basket is free.”

One Saturday morning, Mrs. Batliwala finished her shopping and left the super market. But soon she discovered that she had forgotten to buy powder tea. She rushed back, got the tea and went towards the cash-desk. As she did so, she saw the manager of the supermarket come up to her.

“Madam,” he said holding out his hand, “I want to congratulate you! You are our lucky customer and everything you have in your basket is free!”

(Q. 11- 12) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 2 × 1 = 2 M

Question 11.
The housewives who went to the super market were
A) rich
B) hopeful
C) lucky
D) greedy
Answer :
B) hopeful

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 12.
Mrs. Batliwala’s friends felt
A) that she would certainly win the free offer
B) that she would never win the free offer
C) that they would each win the free offer
D) that they would never win the free offer
Answer :
C) that they would each win the free offer

(Q. 13- 16) Answer the following questions in one or two sentences in your own words. 4 × 2 = 8 M

Question 13.
Why did the manager hold out his hand ?
Answer :
The manager of the supermarket held out his hand in order to congratulate the lucky customer Mrs. Batliwala. She was the lucky winner of that week.

Question 14.
What did Mr. Batliwala want ?
Answer :
Mr. Batliwala wanted his wife to stop buying useless things.

Question 15.
Why did Mrs. Batliwala rush back ?
Answer :
Mrs. Batliwala rushed back to get tea because she discovered that she had forgotten to buy tea powder.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 16.
What message does the writer want to convey through this passage ?
Answer :
The writer wants to convey the message that greed brings grief and don’t expect anything for which you did not work.

EXERCISE – 2

Read the following poem.

I build walls
Walls that protect,
Walls that shield,
Walls that say I shall not yield
Or reveal
Who I am and how I feel.
I build walls
Walls that hide,
Walls that cover what’s inside,
Walls that stare or smile or look away,
Silent flies,
Walls that even block my eyes
From the tears I might have cried.

I build walls
Walls that never let me
Truly touch
Those I love so very much.
Walls that need to fall!
Walls mean to be fortresses
Are prisons after all.

(Q. 11 – 12) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 2 × 1=2 M

Question 11.
The poet uses “Walls” as a
A) Metaphor
B) Alliteration
C) Simile
D) Personification
Answer :
D) Personification

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 12.
The expression ‘silent lies’ in the second stanza implies
A) Walls make one hide one’s true feelings
B) Walls lie silently around all of us
C) Walls are silent
D) Walls are liars
Answer :
A) Walls make one hide one’s true feelings

(Q. 13 – 16) Answer the following questions in one or two sentences in your own words. 4 × 2=8 M

Question 13.
Why is it not a good idea to have these ‘walls’?
Answer :
It is not a good idea to have these ‘walls’ because they act as a prison.

Question 14.
Walls built to protect us ultimately turn into a prison. What is it a good example of ?
Answer :
Walls built to protect us ultimately turn into a prison is a good example of paradox.

Question 15.
What are the walls in the poem made of ?
Answer :
The walls in the poem are made of hidden feelings and thoughts.

Question 16.
What happens when walls act as a protection ?
Answer :
When walls act as a protection they surrender to strong feelings.

EXERCISE – 3

Study the table carefully.
Subjects

TS 8th Class English Guide Unit 1C A Letter to a Friend 2

(Q. 11 – 12) Now, answer the following questions. Each question has four choices. Choose the correct answer and write (A), (B), (C) or (D) in your answer booklet. 2 × 1 = 2 M

Question 11.
How many marks did Gouri score in English ?
A) 150
B) 62
C) 75
D) 78
Answer :
C) 75

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 12.
Who secured the highest score in Maths ?
A) Ankita
B) Bakul
C) Himani
D) Deepali
Answer :
B) Bakul

(Q. 13 – 16) Answer the following questions in one or two sentences in your own words. 4 × 2 = 8 M

Question 13.
What does the above table show ?
Answer :
The above table shows the percentage of marks obtained by different students in different subjects.

Question 14.
Who got better marks in Biology – Chaitanya or Himani?
Answer :
Himani got better marks (72) in Biology.

Question 15.
In which subject(s) did Gauri score the lowest marks ?
Answer :
Gouri scored the lowest marks in Hindi and Maths.

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 16.
How many marks did Deepali score in Physics and Chemistry together?
Answer :
Deepali scored 135 marks in Physics and Chemistry.

Section – B : Vocabulary and Grammar

(Questions 17 – 21)

Read the following passages focusing on the parts that are underlined and answer the questions given at the end. Write the answers in your answer booklet. 5 × 1 = 5 M

EXERCISE – 1

For many of us, school holidays are the happiest ……… (17) time of the year. No exams, no teachers, yes ……….. (18) books, no lessons, no classes! But where ……… (19) if you didn’t have a school to go to? In many places around a ……… (20) world, poor children, especially girls, cannot ……… (21) attend school.

Question 17.
The comparative degree of the underlined word is
A) happy
B) happily
C) happier
D) happyer
Answer :
C) happier

Question 18.
Replace the underlined word with a suitable word.
A) new
B) no
C) knew
D) old
Answer :
B) no

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 19.
Replace the underlined word with a suitable word.
A) what
B) who
C) whose
D) when
Answer :
A) what

Question 20.
Rewrite the underlined word with a suitable article.
A) an
B) no article
C) the
D) zero article
Answer :
C) the

Question 21.
The short form of the underlined word is
A) canot
B) can’t
C) could not
D) couldn’t
Answer :
B) can’t

EXERCISE – 2

Days passed, and the tea pluckers which (17) walked past their home always had reports about the panther. It had been seen near the workshop (18). The previous night, it was heard whimpering near the cattle shed of the school headmaster (19). Yet, no dogs disappeared (20), nor were any cattle attacked. That was a mystery (21).

Question 17.
Replace the underlined word with a suitable word.
A) whom
B) whose
C) those
D) who
Answer :
D) who

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 18.
The underlined sentence can also be expressed as
A) It was seen near the workshop.
B) The people had seen it near the workshop.
C) The people were seeing it.
D) The people have seen it.
Answer :
B) The people had seen it near the workshop.

Question 19.
The underlined word is a
A) compound noun
B) compound adjective
C) compound preposition
D) complex noun
Answer :
A) compound noun

Question 20.
The prefix of the underlined word is ……
A) ed
B) appear
C) dis
D) mis
Answer :
C) dis

Question 21.
The synonym of the underlined word is ……
A) fact
B) file
C) secret
D) celebration
Answer :
C) secret

EXERCISE – 3

My grandfather (17) died on the day I was born, so I don’t (18) remember him at all. He is (19) a scientist studying climate change. Although my grandfather was studying the slow effects of climate change, he died from (20) one of its effects. The rest (21) of my family was at the hospital waiting for me to be born.

Question 17.
The feminine gender of the underlined word is …..
A) grandfathers
B) grandchild
C) grandmother
D) grandparents
Answer :
C) grandmother

TS 8th Class English Guide Unit 1C A Letter to a Friend

Question 18.
The full form of the underlined word is …..
A) does not
B) doesn’t
C) didn’t
D) do not
Answer :
D) do not

Question 19.
The correct be form of the underlined word is ……
A) am
B) was
C) were
D) has
Answer :
B) was

Question 20.
The part of speech of the underlined word is ….
A) noun
B) preposition
C) pronoun
D) adjective
Answer :
B) preposition

Question 21.
The synonym of the underlined word is …..
A) relaxed
B) free
C) remaining
D) entire
Answer :
C) remaining

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Questions 22 – 26)

Complete the following passage choosing the right words from those given below it. Each blank is numbered, and for each blank four choices (A), (B), (C) and (D) are given. Choose the correct answer from these choices and write (A), (B), (C) or (D) in your answer booklet. 5 × 1 = 5 M

EXERCISE – 1

John Amos is a salesman. He …… (22) from door to door selling vacuum cleaners.
On his first day of work, he decided to sell his goods by ……. (23) on the doors of a private housing area.
“My first customer,” he thought as he ……. (24) the doorbell of the first house. A middle aged woman ………. (25) curlers in her hair opened the door. John began to ……….. (26) who he was and the product he was selling. The next minute, the door was slammed shut.

22. A) gone
B) go
C) goes
D) going
Answer :
C) goes

23. A) knocking
B) breaking
C) opening
D) closing
Answer :
B) breaking

24. A) press
B) presses
C) pressed
D) pressing
Answer :
C) pressed

TS 8th Class English Guide Unit 1C A Letter to a Friend

25. A) from
B) with
C) besides
D) at
Answer :
B) with

26. A) explained
B) explains
C) explaining
D) explain
Answer :
D) explain

EXERCISE – 2

Going to parties can be fun and enjoyable. If you are invited to a party, do call your host up early to …….. (22) him whether you will be able to attend. If you want to ……….. (23) along someone who has not been invited along with you, you should ask for ………. (24) first. Remember to ……. (25) appropriately for the party. You will stick out like a …….. (26) thumb if you are dressed formally whereas everyone else is in T-shirt and jeans. If you are not sure of what to wear, do ask your host.

22. A) inform
B) indicate
C) invite
D) insult
Answer :
A) inform

23. A) take
B) carry
C) bring
D) acompany
Answer :
C) bring

24. A) invitation
B) attention
C) permission
D) situation
Answer :
C) permission

TS 8th Class English Guide Unit 1C A Letter to a Friend

25. A) eat
B) dress
C) drink
D) welcome
Answer :
B) dress

26. A) sour
B) soar
C) sore
D) soul
Answer :
C) sore

EXERCISE – 3

Someone knocked on my door one night when I was reading. I opened the door and came face to …… (22) with a strange man. He was ……… (23) a pair of black spectacles and a tuxedo, ………. (24) was rather unusual, especially in this warm climate. In his ……… (25), he held a cane. It occurred ………. (26) me that I had seen this man before but I could not recall when or where.

22. A) head
B) face
C) top
D) bottom
Answer :
B) face

23. A) wearing
B) keeping
C) putting
D) looking
Answer :
A) wearing

TS 8th Class English Guide Unit 1C A Letter to a Friend

24. A) who
B) whom
C) which
D) those
Answer :
C) which

25. A) brain
B) hand
C) wrist
D) mouth
Answer :
B) hand

26. A) for
B) to
C) with
D) from
Answer :
B) to

(Questions 27-31)

Read the following passages. Five sentences are numbered. Each numbered sentence has an error. Find the error and write the correct sentences in your answer booklet. 5 × 1=5 M

EXERCISE – 1

I remember the happy movement …….. (27) when our uncle visited us. He brought toys and fruit to us. …….. (28) Our aunt brought me a new dress for Dasara. Why …….. (29) we enjoyed Deepavali! Still I hear the sound of crackers, I can see the rockets flying into the sky making the night full of bright! …….. (30) Where are those days ? My child don’t …….. (31) know his uncle or aunt. For him, uncle and neighbour are the same.
Answer :
27. moments
28. for
29. How
30. light
31. doesn’t

TS 8th Class English Guide Unit 1C A Letter to a Friend

EXERCISE – 2

Now I am working in ……. (27) Microsoft, a software company, Hyderabad, as a Computer Programmer. I am marriage ……. (28) and we have a child. My wife works at Dell, Hyderabad as a System Analyst. You know city life is quite lazy ……… (29). We start in the morning; leaving …….. (30) our child at the baby care centre and come back in the evening with faded faces. We hardly find time to sit together. How disgust. ……. (31) We work with computers, think like computers and live like computers. We have forgotten our family.
Answer :
27. at
28. married
29. busy
30. leave
31. disgusting

EXERCISE – 3

‘Amma is often like this this ……. (27) days. She don’t ……. (28) recognize anybody,’ Gopi’s sister explained. ‘But sometime …….. (29) her memory is quite sharp. Then she asks me if you have sent any letter. I tell her everything is fine from …….. (30) you, Vimala and the kids. What is the point of telling her that you haven’t written for as …….. (31) year? Poor thing! I wouldn’t dream of making her unhappy.’
Answer :
27. these
28. doesn’t
29. sometimes
30. with
31. a

EXERCISE – 4

I cannot remembered (27) my mother, but when at $(\mathbf{2 8}$ ) the early autumn morning the smell of the shiuli flowers float (29) in the air, the scent (30) the morning service in the temple come (31) to me as the scent of my mother.
Answer :
27. remember
28. in
29. floats
30. of
31. comes

TS 8th Class English Guide Unit 1C A Letter to a Friend

EXERCISE – 5

I remember Why (27) we played gilli-danda, hide and seek and kabaddi. We went for swimming in our local tank on (28) every Sunday. Here we live in a (29) apartment where there is no room to play. Our flat are (30) our world, just like a well for a frog! (The world remains unheed (31.)
Answer :
27. how
28. every Sunday 29. an
30. is
31. unheeded

Scetion – C: Conventions of Writing

(Question 32)

Read the following passages carefully and supply the punctuation marks (., ! ? ” “) and capital letters, wherever necessary. Also correct the spellings of the underlined words. 5 × 1 = 5 M

EXERCISE – 1

now, ladies and gentlemen, said the magician, having shown you that the cloth is absolutely empty I will proced to take from it a bowl of gold fish.”
Answer :
“Now, ladies and gentlemen,” said the magician, “having shown you that the cloth is absolutely empty, I will proceed to take from it a bowl of gold fish.”

EXERCISE – 2

The fourth man said I noticed that those footprints were not only smaller but depper and so i concluded that the woman was pregnant
Answer :
The fourth man said, ‘I noticed that those footprints were not only smaller but deeper and so I concluded that the woman was pregnant.’

TS 8th Class English Guide Unit 1C A Letter to a Friend

EXERCISE – 3

‘I will try to come’ said Hiramantota. And I have one favour to ask you. will you allow me to carry back to my master a speciman of the fruit of immortality which grows in these forests?
Answer :
‘I will try to come,’ said Hiramantota. ‘And I have one favour to ask you. Will you allow me to carry back to my master a specimen of the fruit of immortality which grows in these forests?’

Section – D : Creative Writing (Discourses)

(Question – 33)

A) Read the following poem:
If a tree could talk, what would it say?
“Don’t chop me down, just walk away.”
If a river could talk, what would it say?
“Don’t dump in trash, throw it away.”
If the air could talk, what would it say?
“The factories must learn to keep smoke away.”
If the animals could talk, what would they say?
“Help us to live, we wish to stay.”
If the Earth could talk, what would it say?
“Protect me by making every day Earth day!
Now choreograph the above poem. While writing the choreography script keep the following details. 12 M

Title
Theme
Instances of the theme
Locations
Characters involved
Sequence of actions
Answer:
Title of the poem : IF A TREE COULD TALK

Themes of the poem :
1) The plight of natural things
2) The appeal made by natural resources

Instances :
1) The tree pleads the wood cutter not to chop it down and just walk away.
2) The river requests mankind not to dump trash in it and throw it away.
3) The air appeals to factories that they must learn to keep smoke away.
4) The animals beg hunters to help them to live as they wish to stay.
5) The earth urges mankind to protect her by making every day, Earth day.

Setting : Forest, river, factories, earth, tree, animals, air, mankind
Sequence of actions :
Scene-1 :
The chorus enters the stage and creates the atmosphere of a forest.
A wood cutter is seen with an axe in his hand.
The tree pleads him not to chop it down and just walk away.
Scene -2 :
The chorus enters the stage and creates the atmosphere of a river.
A worker is seen with a bin of trash.
The river requests him not to dump in trash and throw it away.
Scene – 3
The chorus enters the stage and creates the atmosphere of pollution in the surroundings of factories.
A lot of smoke mixes with the air.
The air appeals to factories that they must learn to keep smoke away.
Scene -4
The chorus enters the stage and creates the atmosphere of a jungle.
A hunter is seen with a deadly weapon.
The animals beg the hunter to help them to live as they wish to stay.
Scene -5
The chorus enters the stage and creates the visual image of the earth.
People are seen destroying the ozone layer.
The earth urges mankind to protect her by making every day, Earth day.

TS 8th Class English Guide Unit 1C A Letter to a Friend

(OR)

B. Look at the picture given below that shows children crossing a stream to attend school during flood.
TS 8th Class English Guide Unit 1C A Letter to a Friend 4
Write a news report on the picture.
Answer :
Flood poses problem to school kids
(Pooja Mehra)
Alampoor, 20th November, 20XX: The incessant rain lashed Alampoor. As a result, the Tungabadra River has swollen. One of the sides of the strong reservoirs collapsed due to the power of the water. So the storage water gushed out of it into the village. The whole village was submerged under filthy rain water. The flood water blocked all the streets.

There was flood even after the heavy rain. But three school kids are least worried about the flood. In an attempt to reach school which is across the stream, they have made a small boat to cross the stream and reach school. But the terrible thing is, they are too small to understand the danger in crossing the water body. Anyway, they got a boat and are sitting on the boat too uncomfortably. Moreover, they are carrying heavy bags on their back which is not at all advisable. They are unable to look at the path ahead of them. It is too tough for them to ride. However, they are riding on and reaching the bank. They have been managing to attend school on the boat for the past two days. The innocent children’s life is at risk. Anything can happen to them at any time. They are living very dangerously.

The collector said that the state Government has already taken necessary immediate measures to redress the situation. He added that some special boats will be arranged for the students to attend their school without any difficulty. But such signs are not visible in the village.

The people of the flood-affected village are living in the grip of fear. All the parents are concerned about the safety of their children whom they love very much. The flood affected victims are eagerly waiting for instant and timely help from the Government and also welfare organisations.

TS 8th Class English Guide Unit 1C A Letter to a Friend

(Question – 34)

A. Design a poster on the prevention of ‘pollution’. 8 M
Answer:
TS 8th Class English Guide Unit 1C A Letter to a Friend 3

(OR)

B. Read the following information about Rabindranath Tagore, the Nobel Prize recipient. Now write a biographical sketch of Tagore.
Points to be covered : Details of the person
Date and place of birth : rich and cultured family at Jorasanko in
Kolkata – May 7, 1861
Parents : Maharshi Debendranath Tagore and Sarada Debi
Versatile qualities : writer, painter, poet, philosopher, novelist, educationist, singer, storywriter, essayist
Notable works : Geetanjali, Rabindra Sangeet, Amar Shonar Bangla, Ghare -Baire
Notable awards : Nobel Prize in literature
Demise : 7 August, 1941 in Kolkata
Answer :
Rabindranath Tagore :
Rabindranath Tagore was born in a rich and cultured family at Jorasanko in Kolkata on May 7, 1861. His parents were Maharshi Debendranath Tagore and Sarada Debi. He began writing poems from his very childhood. He was a writer, painter, poet, philosopher, novelist, educationist, singer, story writer, essayist and what not. His important works include Geetanjali, Rabindra Sangeet, Amar Shonar Bangla and Ghare -Baire. The National Anthem of India, Jana Gana Mana, was composed by this patriotic poet. In 1913, Rabindranath Tagore was awarded the Nobel Prize in literature for English version of “Geetanjali”. This great personality passed away on 7 August, 1941 (aged 80) in Kolkata.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

These TS 6th Class Science Important Questions 1st Lesson Our Food serves as a valuable tool for students to prioritize their studying and revision efforts.

TS 6th Class Science Important Questions 1st Lesson Our Food

Question 1.
What are lnqrodients?
Answer:
The substances us which are required to prepare food are known as ingredients.

Question 2.
What should we observe when we purchase various packed food items?
Answer:
When we purchase packed food, biscuits or any cold drink we should find their ingredients and manufacturing date written on their packets.

Question 3.
Write any two food items that are preserved in your house by salting.
Answer:
Mango pieces, dry fish etc.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 4.
What are the ingredients necessary for preparation of biryani or kheer?
Answer:

  1. Fresh milk is the main and base ingredient of kheer.
  2. Other ingredients include sugar or jaggery, ilachi, sago and semya.

Question 5.
Write the condiments used by your mother ¡n preparing tasty biryani on holiday?
Answer:
Biryani rice, ilachi, daichini, biryani leaves, pepper, cloves etc. are the ingredients which are used for preparing spicy foods such as biryani, pulav etc.

Question 6.
Name any two food items made by fermentation process.
Answer:
Dosa dough and bakery items like bread, cakes etc.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 7.
What did you eat yesterday ? Make a list and identify the food components present in them.
Answer:
I ate following food items yesterday.

(a) BreakfastFood Components
IdliRice flour, black gram
ChutneyGroundnuts, oil, taalimpu, salt
(b) LunchFood Components
RiceRice
Dal soupDal, oil, taalimpu, green chilly, onion chilly powder, salt
(c) DinnerFood Components
Rice and veg curryTomato, onion, brinjal, oil, chillies, garlic and salt etc

Question 8.
Write about a few tips or the preparation of food items which are prepared in your house.
Answer:

  1. Preparing food is an extremely important art, essential for life.
  2. There are many ways of preparing food.
  3. Rice is boiled but idly along with rice is to be fermented followed by steaming.
  4. Potato chips are fried in oil.

Question 9.
How do farmers protect rice from pests and store it after it is harvested?
Answer:
The farmers store the rice in different storage bins. Before preserving the rice, farmers keep the harvested grains for drying. After complete drying, the rice will be stored in the bins. Various storage bins are widely used in Andhra Pradesh for preserving of rice. Eg : Pun, metallic bins, pucca kotlu, asbestos roof godowns etc.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 10.
Why curry gets spoiled when kept out for a couple of days but pickle stays fresh for so long?
Answer:
Curry gets spoiled when kept out for a couple of days but pickle stays fresh for so long. IFs only because of preservation. For preserving certain food items, they are salted and dried.

Question 11.
What are the food materials preserved by smoking? Find out more about the process of smoking.
Answer:
Fish and meat are the foods usually preserved by smoking method. In this method smoking, heat from the smoke helps in removal of moisture. Exposure to smoke also gives a characteristic flavour of the food.

Question 12.
What is vegetable carving?
Answer:
Preparation of food using vegetables and fruits is an art. Some people make different types of designs and decorations with vegetables. This is called vegetable carving.

Question 13.
Write the methods of storage of food.
Answer:

  1. Drying
  2. Mechanical drying
  3. Saltin
  4. Fuming
  5. Canning etc.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 14.
How is tea prepared ? What are the ingredients to prepare tea?
Answer:
Ingredients needed for preparation of tea: Milk, water, tea powder, sugar etc.

  1. First required amount of water is taken into the vessels.
  2. It is boiled. Then sufficient amount of tea powder is added to boiling water.
  3. It is allowed to boil for a few minutes.
  4. Then milk is added to the boiling decoction. Required amount of sugar is added. Tea is ready.

Question 15.
Some food materials are given below. What are the different possible ways of cooking them ? Write in a tabular form. Meat, Groundnuts, Potatoes, Spinach, Eggs, Fish, Rice, Tomatoes
Answer:

MeatCurry, fry, dum biryani
GroundnutMasala, chutney, pakodi
PotatoesFry, curry, chips
SpinachCurry, fry
EggsFry, curry, omelette
FishCurry, fry etc.
RiceSweets, Rice dosa etc.
TomatoPickle, curry, fry, chutney

Question 16.
Give examples for vegetables and leafy vegetables which are in your surroundings.
Answer:
Vegetables : Bitter gourd, Ridge gourd, Bhendi, Brinjal, Tomatoes, Green chilli etc.

Leafy vegetables: Amaranth, Karivepaku, Mint, Cabbage, Spinach, Palak etc.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 17.
Explain the different methods of food preservation.
(Or)
Write any two types of food preservation methods with suitable examples.
Answer:
Drying : Drying is a method to dry the food material under sunlight. Food material like fish, kishmis etc, are preserved with the help of drying method.

Salting : Food material such as mango, tomato and other vegetable pieces are preserved by adding salt. Required amount of oil is also added to the material.

Canning : Jams, pickles and some fruits are preserved in the cans. Air-tight cans are used in this method.

Mechanical drying: Electrical machine plates are used to dry the flour or wheat, rice and other food products in this mechanical drying.

Question 18.
What are the different food items you eat in your breakfast?
Answer:
Dosa, vada, idli, pun, chapathi, pulihora, kichidi, bajji, punugulu etc.

Question 19.
What questions do you ask your teacher about food preservation methods ?
Answer:

  1. How can we preserve food material ?
  2. Are there any methods to preserve food items ?
  3. What method should we follow to preserve pickles ?
  4. Can we preserve foods like chapathi or rice for some days ?
  5. What are the benefits of preserving foods ?

Question 20.
Cooked curries get spoiled when kept out for a couple of days but pickles stay fresh for a long time. Imagine and write the reasons for this.
Answer:
Cooked food materials are added with more water whereas pickles are added with more salt. The salt in the pickles make them fresh and preserve for a long time. Hence cooked curries get spoiled when kept out for a couple of days.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 21.
Collect the information from any five of your classmates about what food they had taken previous day.

Name of the studentFood eaten
Eg : AshokRice, dal, milk, vegetables, idly

Answer:
I collected the information from 5 of my classmates, about what food they had taken previous day. The tabulated list is given below.

Student NameFood eaten
1. NeelamBiryani, chilli chutney, roti
2. RaviVegetable curry, rice, dosa, soup
3. KiranCurd rice, sambar, idli, chapathi
4. RamuChicken biryani, pakoda, vada
5. SrinuMilk, ice cream, chocolate, vegetable rice

Question 22.
Anil has been asked by his teacher to collect the information of required ingredients for the following food items which he likes. He has to prepare the chart, display it in the class. The favourite food Items are …
(a) payasam
(b) chicken curry
(c) pallikaram rice
(d) dal soup (pappu charu)
(e) Tamarind rice (pulihora). If you were in the place of Anil how would you collect and what can you write for needed food items?
Answer:

Favourite food itemRequired ingredients
1. PayasamSemiya, Sugar, Sago (sabudana) cashew nut, kismis, ilaichi etc.
2. Chicken curryChicken pieces, chilli powder, onions,oil, salt, spices like cloves, ginger, coriander etc.
3. Pallikaram – ricePallis, rice, dry chillies, oil
4. Dal – soup (pappu charu)Dal (Red gram / green gram), oil, water, chillies, onions, jeera, mustard, garlic, chilli powder, tomatoes, tamarind
5. PulihoraRice, Tamarind, oil, dry chillies, green chillies, ground nut, red gram mustard, jeera, green gram etc.

Question 23.
Some ingredients have been listed below. Find out the source of each ingredient, if it is a plant mark (P) or an animal (A), or something else (E).
1. Cooking oil
2. Honey
3. Chips
4. Turmeric powder
5. Salt
6. Dough
7. Mutton
8. Rice
9. Eggs
10. Sugar
11. Peanuts
Answer:

IngredientsP or A or EName of plant or animal
1. HoneyAA Honey bees
2. ChipsPPotato or Banana
3. Turmeric PowderPTurmeric Plant
4. SaltE
5. DoughPWheat
6. MuttonAGoat or sheep
7. RicePPaddy
8. EggsAHen
9. SugarPSugarcane
10. PeanutsPPea plants

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 24.
Identify the part of the plant eaten by us in the given products? Discuss with you friends. Tabulate the information.
Answer:

1. FenugreekName of the plantParts that we eat
2. Mustard1. Mustard (Avalu)seeds
3. Sugarcane2. Sugarcane stemstem
4. Carrot3. Carrot rootroot
5. Cabbage4. Onion bulb, leavesbulb, leaves
6. Asafoetida5. Cabbage leavesleaves
7. Onion6. Asafoetida (Inguva)leaves, fruit

Question 25.
Write the procedure for preparing any two food items you like most
(Or)
Write the procedure for making idli/puri/pulihora. Write their ingredients.
Answer:
1. idli:
Ingredients: Black gram, rice flour, salt, water etc.
Procedure:

  1. Black gram is soaked for few hours.
  2. Then it is ground. It is added to rice flour (Uppudu ravva).
  3. The mixture is allowed to ferment for one night. Next day morning the dough is ready for preparing idli.

2. Puri:
Ingredients: Myda flour, oil, potatoes, onion, taalimpu dmusulu, water etc.

Procedure:

  1. Myda flour is mixed with water.
  2. It is mixed thoroughly until it becomes like a ball.
  3. It is divided into small balls and made as round flattened items.
  4. They are fried in boiling oil.
  5. Curry is prepared with potatoes, onion, chillies and oil.

3. Pulihora:
Ingredients : Rice, oil, tamarind/lemon, taalimpu dinusulu, water etc.

Procedure:

  1. Rice is cooked at first and kept aside.
  2. Sufficient juice of tamarind or lemon is prepared.
  3. Taalimpu dinusulu are fried in the oil.
  4. If it is lemon pulihora, lemon juice is added to rice and followed by adding taalimpu dinusulu.
  5. If it is tamarind juice, all taalimpu is added with tamarind.
  6. Then tamarind taalimpu is mixed with rice. Pulihora is ready.

TS Board 6th Class Science Important Questions 1st Lesson Our Food

Question 26.
List out the ingredients that are needed to make vada. Are they same for dosa?
Answer:
Ingredients for vada preparation: Black gram, coriander, green chilli, rice flour, edible oil etc. They are not same for dosa.

Question 27.
What material would you use to preserve pickles?
Answer:
Oil and salt are primarily used. Taalimpu dmusulu are also added to get flavour of the pickle.

Question 28.
Write the names of any two milk and meat giving animals.
Answer:
Goat, sheep etc are both milk giving and meat giving animals.

Question 29.
Read the roiowcng table and answer the given questions

Types of PreservationPreserved Items
Salt, Chilli Powder, OilPickles
Adding SaltMango pieces
DryingFish
Adding Sugar SyrupFruit Juices, Jams

 

a) Which items do you use for preserving pickles ? Ans. Salt, chilli powder, oil etc.
b) Which items do you preserve at your home by drying ? Ans. Fish, Dates etc.
c) Which items do you use to preserve jams and fruit juices ? Ans. Sugar syrup.
d) What are the other methods to preserve the food items ? Ans. Canning, mechanical drying etc.

Question 30.
Method of preparing food items.
Answer:

Method of PreparationFood Items
FermentationIdly, Dosa
FryingChopped vegetables, Groundnuts, Bengal gram
Deep FryingFish, Chicken
Shallow FryingGreen chillies, Dosa

(a) Which food items are prepared by fermentation process ?
Answer:
Idly, Dosa

(b) How are fish and chicken cooked ?
Answer:
Deep frying

(c) Which process is used to prepare dosa ?
Answer:
Fermentation followed by frying.

(d) Which food items are prepared by steaming process ?
Answer:
Idli

Question 31.
List out the different ingredients that are used to make the items given

Mixture / ItemRequired ingredients
1) TeaMilk, water, sugar, tea powder, ginger etc.
2) Laddu
3) Lemon Juice
4) Payasam

Answer:

Mixture / ItemRequired ingredients
1) TeaMilk, water, sugar, tea powder, ginger etc.
2) LadduJaggery, ghee, dal flour etc
3) Lemon JuiceLemon, water, sugar etc.
4) PayasamMilk, ghee, jaggery, semya ere

Question 32.
List out any 8 methods of preparing food items with suitable examples. Tabulate the information.

Eg : Method of preparing foodFood items
FryingChicken

Answer:

Method of preparing foodFood items
BoilingPotatoes, eggs
SteamingIdlis
FermentationDosa :
RoastingChicken
Deep fryingFish, mutton etc.
Shallow fryingGroundnut, dal
Chopping and mixingVegetables fry
Cutting and mixingVegetable salad or fruit salad

Question 33.
Identify the following vegetables, label them, write the names of the dishes that can be prepared by using them in the kitchen.
TS Board 6th Class Science Important Questions 1st Lesson Our Food 2

The above given vegetables are
(a) Brinjal
(b) Beans and
(c) Potato.

The following food varieties can be prepared from these three.
Answer:
(a) Brinjal : Curry, guthi vankava curry, fry, brinjal pickle (preserved one), roti chutney (grinding chutney)
(b) Beans : Curry, fry, bean pickle
(c) Potatoes : Curry, fry, potato chips, potato kurma etc.

Question 34.
Draw the diagrams of fruits of your interest.
Answer:
TS Board 6th Class Science Important Questions 1st Lesson Our Food 1

Question 35.
Write your feelings about preparation of different shapes in vegetables carving ?
Answer:

  1. Vegetable carving is a skill that shows one’s aesthetic sense and creativity.
  2. If anyone does vegetables carving we can’t keep quiet without appreciating him/her.
  3. The vegetables or fruits that are carved make us to attract towards them ’ to consume.
  4. Carving vegetables or fruits reveal us the importance of growing plants.

Question 36.
What food habits did you learn from the lesson “Our Food” ?
Answer:

  1. Eat only vegetables and healthy food items.
  2. Do not eat junk foods.
  3. Check the date of manufacturing and expiry date of packed food items before eating them.
  4. Eat only protein, energy giving and protective food items.
  5. Drink sufficient water for proper digestion.
  6. Take fibre rich food to avoid constipation.

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Students must practice this TS Intermediate Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b) to find a better approach to solving the problems.

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b)

I.
Question 1.
Find all the values of
i) (1 – i√3)1/3
ii) (- i)1/6
iii) (1 + i)2/3
iv) (- 16)1/4
v) (- 32)1/5
Solution:
z = 21/3 \(\left(\frac{1}{2}-\frac{i \sqrt{3}}{2}\right)^{1 / 3}\)
= 21/3 \(\left[\cos \frac{\pi}{3}-i \sin \frac{\pi}{3}\right]^{1 / 3}\)
= 21/3 \(\left(\cos \frac{\pi}{9}-i \sin \frac{\pi}{9}\right)\)
General solution be = 21/3 cis (6k – 1) \(\frac{\pi}{9}\), k = 0, 1, 2, ……………

ii) (- i)1/6

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b) 1

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

iii) z = (1 + i)2/3

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b) 2

iv) z = (- 16)1/4
= (2) [(- 1)]1/4
= (2) [cos 2nπ + π) + i sin (2nπ + π)]1/4
= 2 [cis (2n + 1)π]1/4
= 2 [cis (2n + 1) \(\frac{\pi}{5}\)]

v) z = (- 32)1/5
z = 2 (- 1)1/5
= 2 [cos (2n + 1)π + i sin (2n + 1)π]1/5
= 2 [cis (2n+ 1) \(\frac{\pi}{5}\)].

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 2.
If ABC arc angles of a triangle such that x = cis A, y = cis B, z = cis C then find the value of xyz.
Solution:
A + B + C = π
Now xyz = eiA . eiB . eiC
= ei(A + B + C)
= ei(π)
cos π + i sin π
xyz = – 1 + 0

Question 3.
i) If x = cis θ then find the value of (x6 + \(\frac{1}{x^6}\))
ii) Find cube roots of 8.
Solution:
i) x6 = e
\(\frac{1}{x^6}\) = e– 6iθ
x6 + \(\frac{1}{x^6}\) = e + e– 6θi
= cos 6θ + i sin 6θ + cos 6θ – isin 6θ
= 2 cos 6θ.

ii) x = (8)1/3
x3 – 8 = 0
(x – 2) (x2 + 2x + 4)
x = 2, x = \(\frac{-2 \pm \sqrt{4-16}}{2}\)
x = \(\frac{-2 \pm 2 \sqrt{3} \mathbf{i}}{2}\)
x = – 1 ± √3i
Roots are 2, 2ω, 2ω2.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 4.
If 1, ω, ω2 are cube roots of unity, then prove that
i) \(\frac{1}{2+\omega}+\frac{1}{1+2 \omega}=\frac{1}{1+\omega}\)
ii) (2 – ω) (2 – ω2) (2 – ω10) (2 – ω11) = 49
iii)(x + y + z) (x + yω + zω) (x + yω + zω) = x3 + y3 + z3 – 3xyz
Solution:
\(\frac{1}{2+\omega}+\frac{1}{1+2 \omega}=\frac{1}{1+\omega}\)

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b) 3

ii) (2 – ω) (2 – ω2) (2 – ω10) (2 – ω11) = 49
L.H.S = (4 – 2(ω + ω2) + ω3) (4 – 2 (ω10 + ω11) + ω21)
= (4 – 2 (- 1) + 1) (4 – 2 (ω + ω2) + (ω3)7)
= (7) (4 + 2 + 1) = 49.

iii) (x + y + z) (x + yω + zω) (x + yω + zω) = x3 + y3 + z3 – 3xyz
LH.S = (x + y + z) (x + yω + zω2) (x + yω2 + zω)
= [x2 + xyω + xzω + yx + y2ω + yzω2 + zx + zyω + z2ω] (x + yω + zω)
= [x + xy(1 + ω) + yz (ω + ω2) + zx (w2 + 1) + z22) + y2ω] (x + yω2 + zω)
= [x3 + x2y (1 + ω) + xyz(- 1) + zx2(1 + ω2) + z22 + xy2ω + yx2ω2 + 2ω(- ω) – y22 – xyz + z2yω + y3 + x2zω – zxy – yz2ω – z22 + z3 + zy2ω2]
= x3 + y3 + z3 – 3xyz.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 5.
Prove that – ω and – ω2 are roots of z2 – z + 1 = 0 where ω and ω2 are the complex cube roots of unity.
Solution:
z2 – z + 1 = 0
z = \(\frac{1 \pm \sqrt{1-4}}{2}\)
z = \(\frac{1 \pm \sqrt{3} i}{2}\)
z = \(\frac{-[-1 \mp \sqrt{3} i]}{2}\)
z = – ω, – ω2

Question 6.
If 1, ω, ω2 are the cube roots of unity, then find the values of the following.:
i) (a + b)3 + (aω + bω2)3 + (aω2 + bω)3
ii) (a + 2b)2 + (aω2 + 2bω)2 + (aω + 2bω2)2
iii) (1 – ω + ω2)3
iv) (1 – ω) (1 – ω2) (1 – ω4) (1 – ω8)
v) \(\left(\frac{a+b \omega+c \omega^2}{c+a \omega+b \omega^2}\right)+\left(\frac{a+b \omega+c \omega^2}{b+c \omega+a \omega^2}\right)\)
vi) (1 + ω)3 + (1 + ω2)3
viij (1 – ω + ω2)5 + (1 + ω – ω2)5
Solution:
i)(a + b)3 + (aω + bω2)3 + (aω2 + bω)3
= a3 + b3 + 3a2b + 3ab2 + a3ω3 + b3ω6 + 3a2ω2 . bω2 + 3aω . b2ω4 + a3ω6 . b3ω3 + 3a24 . ω + 3b2ω2 . aω2
= a3 + b3 . 3a2b (1 + ω + ω) + a3 + b3 + 3b2a (ω2 + ω + 1) + a3 . b3
= 3 (a3 + b3)

ii) (a + 2b)2 + (aω2 + 2bω)2 + (aω + 2bω2)2
= a2 + 4b2 + a2ω4 + 4b2ω2 + 4abω3 + a2ω2 + 4b2ω4 + 4abω3
= a2 (1 + ω + ω2) + 4b2 (1 + ω2 + ω) + 4ab (1 + ω + ω2)
= 12ab

iii) (1 – ω + ω2)3
Now, 1 + ω + ω2 = 0
1 + ω2 = – ω
= (- ω – ω)3
= (- 2)3 ω3
= – 8.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

iv) (1 – ω) (1 – ω2) (1 – ω4) (1 – ω8)
= (1 – ω – ω2 + ω3) (1 – ω) (1 – ω2)
= (1 – ω – ω2 + ω3) (1 – ω – ω2 + ω3)
= (1 + 1 + 1) (1 + 1 + 1)
=9

v) \(\left(\frac{a+b \omega+c \omega^2}{c+a \omega+b \omega^2}\right)+\left(\frac{a+b \omega+c \omega^2}{b+c \omega+a \omega^2}\right)\)
= \(\frac{\omega^2\left(a+b \omega+c \omega^2\right)}{\left(c \omega^2+a \omega^3+b \omega^4\right)}+\frac{\left(a \omega^2+b \omega^3+c \omega^4\right)}{\omega^2\left(b+c \omega+a \omega^2\right)}\)
= ω2 + \(\frac{1}{\omega^2}\)
= ω2 + \(\frac{\omega}{\omega^3}\)
= ω2 + ω = – 1

vi) (1 + ω)3 + (1 + ω2)3
= (- ω2)3 + (- ω)3
= – 1 + (- 1) = – 2.

vii) (1 – ω + ω2)5 + (1 + ω – ω2)5
1 + ω2 = – ω
= (- 2ω)5 + (- 2ω2)5
= (- 2)52 + ω)
= (- 2)5 (- 1) = 32.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

II. Question 1.
Solve the following equations.
i) x4 – 1 = 0
ii) x5 + 1 = 0
iii) x9 – x5 + x4 – 1 = 0
iv) x4 + 1 = 0
Solution:
i) x4 – 1 = 0
(x2 – 1) (x2 + 1) = 0
(x – 1) (x + 1) (x – i) (x + i) = 0
x = 1, – 1, i, – i.

ii) x5 = – 1
x = (- 1)1/5
x = [cos (2n + 1) π + i sin (2n + 1) π]1/5 n = 0, 1, 2, 3, 4
= cos(2n + 1) \(\frac{\pi}{5}\) + i sin(2n + 1) \(\frac{\pi}{5}\)

iii) x9 – x5 + x4 – 1 = 0
x5 (x4 – 1) + (x4 – 1) = 0
(x4 – 1) (x5 + 1) = 0
(x – 1) (x + 1) (x – i) (x + 1) (x5 + 1) = 0
x = ± 1, ± i, cis (2n + 1) \(\frac{\pi}{5}\).

iv) x4 + 1 = 0
x = (- 1)1/4
x = [cos (2n + 1)π + isin(2n + 1)π]1/4
x = cos (2n + 1)\(\frac{\pi}{4}\) + i sin(2n + 1)\(\frac{\pi}{4}\)
n = 0, 1, 2, 3.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 2.
Find the common roots of x12 – 1 = 0 and x4 + x2 + 1 = 0.
Solution:
x12 – 1 = 0
(x4)3 – 1 = o
(x4 – 1) [x8 – x4 + 1] = 0
(x – 1) (x + 1) (x – i) (x + i) (x8 + x4 + 1) = 0 (or)
x = (1)1/12
x = [cos 2nπ + i sin2nπ]1/12 n = 0, 1, 2, …………. 11 ……………(1)
x4 + x2 + 1 = 0
(x2 – 1) (x4 + x2 + 1) = 0
x6 – 1 = 0
x = (1)1/6
x = [cos 2nπ + i sin 2nπ]1/6
= \(\cos \frac{2 n \pi}{6}+i \sin \frac{2 n \pi}{6}\), n = 0, 1, 2, 3, 4, 5 …………..(2)
Common roots to (1) and (2)
cis \(\frac{\pi}{3}\), cis \(\frac{2 \pi}{3}\), cis \(\frac{4 \pi}{3}\), cis \(\frac{5 \pi}{3}\).

Question 3.
Find the number of 15th roots of unity, which are also 25th roots of unity.
Solution:

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b) 4

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 4.
If the cube roots of unity are 1, ω, ω, then find the roots of the equation (x – 1)3 + 8 = 0.
Solution:
(x – 1)3 = – 8
(x – 1) = (- 8)1/3
x – 1 = – 2
x – 1 = – 2ω
x – 1 = – 2ω2
∴ x = – 1
x = – 2ω + 1
x = – 2ω2 + 1

Question 5.
Find the roduct of all values of (1 + i)\(\frac{4}{5}\).
Solution:

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b) 5

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 6.
If z2 + z + 1 = 0, where z is a complex number, prove that
\(\left(z+\frac{1}{z}\right)^2+\left(z^2+\frac{1}{z^2}\right)^2+\left(z^3+\frac{1}{z^3}\right)^2\) + \(\left(z^4+\frac{1}{z^4}\right)^2+\left(z^5+\frac{1}{z^5}\right)^2+\left(z^6+\frac{1}{z^6}\right)^2\) = 12.
Solution:
z = ω satisfy
L.H.S = \(\left(z+\frac{1}{z}\right)^2+\left(z^2+\frac{1}{z^2}\right)^2+\left(z^3+\frac{1}{z^3}\right)^2\) + \(\left(z^4+\frac{1}{z^4}\right)^2+\left(z^5+\frac{1}{z^5}\right)^2+\left(z^6+\frac{1}{z^6}\right)^2\)
= (- 1)2 + (- 1)2 + (2)2 + (- 1)2 + (- 1)2 + (2)2 = 12.

III.
Question 1.
1, α, α2, α3, ……………. αn – 1 be the nth roots of unity then prove that 1p + αp + (α2)p + (α3)p + ………….. + (αn – 1)p = {0 if p ≠ kn, n if p = kn. where p, k ∈ N.
Solution:
Now xn – 1 = 0
x = (1)1/n
x = [cos 2nπ + i sin 2nπ]1/n
x = \(\cos \frac{2 m \pi}{n}+i \sin \frac{2 m \pi}{n}\)
α = \(\cos \frac{2 m \pi}{n}+i \sin \frac{2 m \pi}{n}\)
αp = \(\cos \frac{2 m p \pi}{n}+i \sin \frac{2 m p \pi}{n}\)
Now p = kn
1 + 1 + 1 + …………. nterms = n
If p ≠ kn value then1p + αp + (α2)p + (α3)p + ………….. + (αn – 1)p = 0.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Ex 2(b)

Question 2.
Prove the sum of 99th powers of the roots of the equation x7 – 1 = 0 is zero and hence deduce the roots of x6 + x5 + x4 + x3+ x2 + x + 1 = 0.
Solution:
x7 – 1 = 0
x = (1)1/7
x = (cos 2kπ + sin 2kπ)1/7
k = 0, 1, 2, ………., 6
x1 = 1, x2 = \(e^{\frac{2 \pi}{7} i}\), x2 = \(e^{\frac{4 \pi}{7} i}\), x3 = \(e^{\frac{6 \pi}{7} i}\), ………….. x6 = \(\frac{12 \pi}{7} \mathrm{i}\)
x199 + x299 + x399 + …………..
199 + \(\mathrm{e}^{\frac{2 \pi}{7} \cdot 99 \mathrm{i}}+\mathrm{e}^{\frac{4 \pi}{7} \cdot 99 \mathrm{i}}+\ldots \ldots . \mathrm{e}^{\frac{12 \pi}{7} \cdot 99 \mathrm{i}}\) = 0
Roots of x6 + x5 + x4 + x3+ x2 + x + 1 = 0 be \(\cos \frac{2 k \pi}{7}+i \sin \frac{2 k \pi}{7}\); k = 1, 2, 3, 4, 5, 6.
∵ (x7) – 1 = (x – 1) (x6 + x5 + x4 + x3+ x2 + x + 1) = 0
x = 1 is one root
⇒ cis \(\frac{2 k \pi}{7}\); k = 1, 2, 3, 4, 5, 6.

Question 3.
If n is a positive integer, show that (P + iQ)1/n + (P – iQ)1/n = 2 (P2 + Q2)1/2n cos(\(\frac{1}{n}\) tan-1 \(\frac{Q}{P}\))
Solution:
P = r cos θ
Q = r sin θ
(P + iQ)1/n = [r cos θ + i sin θ]1/n
= r1/n \(\left[\cos \frac{\theta}{n}+i \sin \frac{\theta}{n}\right]\)
(P – iQ)1/n = [r cos θ – i sin θ]1/n
= r1/n \(\left[\cos \frac{\theta}{n}-i \sin \frac{\theta}{n}\right]\)
(P + iQ)1/n + (P – iQ)1/n = r1/n [2 cos \(\frac{\theta}{n}\)]
= 2r1/n cos \(\frac{\theta}{n}\)
Now P2 + Q2 = r2
r = (P2 + Q2)1/2
tan θ = \(\frac{Q}{P}\); θ = tan-1 \(\frac{Q}{P}\)
= 2 (P2 + Q2)1/2n cos(\(\frac{1}{n}\) tan-1 \(\frac{Q}{P}\)).

Question 4.
Show that one value of \(\left[\frac{1+\sin \frac{\pi}{8}+i \cos \frac{\pi}{8}}{1+\sin \frac{\pi}{8}-i \cos \frac{\pi}{8}}\right]^{\frac{8}{3}}\) is – 1.
Solution:
\(\left[\frac{1+\cos \left(\frac{\pi}{2}-\frac{\pi}{8}\right)+i \sin \left(\frac{\pi}{2}-\frac{\pi}{8}\right)}{1+\cos \left(\frac{\pi}{2}-\frac{\pi}{8}\right)-i \sin \left(\frac{\pi}{2}-\frac{\pi}{8}\right)}\right]^{\frac{8}{3}}\)

= \(\left[\frac{2 \cos ^2 \frac{3 \pi}{16}+2 i \sin \frac{3 \pi}{16} \cos \frac{3 \pi}{16}}{2 \cos ^2 \frac{3 \pi}{16}-2 i \sin \frac{3 \pi}{16} \cos \frac{3 \pi}{16}}\right]^{\frac{8}{3}}\)

= \(\left[\frac{\cos \frac{3 \pi}{16}+i \sin \frac{3 \pi}{16}}{\cos \frac{3 \pi}{16}-i \sin \frac{3 \pi}{16}}\right]^{\frac{8}{3}}\)

= \(\frac{\mathrm{e}^{\frac{\mathrm{i} \pi}{2}}}{\mathrm{e}^{\frac{-\mathrm{i} \pi}{2}}}\) = e = – 1.

Question 5.
Solve (x – 1)n = xn, n is a positive integer.
Solution:

TS Inter 2nd Year Maths 2A Solutions Chapter 2 De Moivre’s Theorem Exercise 2(b) 6

TS Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Students must practice this TS Intermediate Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c) to find a better approach to solving the problems.

TS Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Exercise 1(c)

I.
Question 1.
Express the following complex numbers in modulus – amplitude form
i) 1 – i
ii) 1 + i√3
iii) – √3 + i
iv) – 1 – i√3
Solution:
i) (1 – i) = r cos θ + i r sin θ
r cos θ = 1, r sin θ = – 1
r2 (cos2 + sin2) = 2
r2 = 2
r = ± √2
tan θ = – 1
θ = \(-\frac{\pi}{4}\)
√2 [cos (\(-\frac{\pi}{4}\) ) + i sin (\(-\frac{\pi}{4}\) )]

ii) 1 + i√3 = r cos θ + r i sin θ
r cos θ = 1 r sin θ = √3
r2 (cos2 θ + sin2 θ) = 1 + 3
r2 = 4
r = ± 2
tan θ = √3
θ = \(\frac{\pi}{3}\)
2 (cos \(\frac{\pi}{3}\) + i sin \(\frac{\pi}{3}\)).

iii) – √3 + i = r cos θ + r i sin θ
r cos θ = – √3
r sin θ = 1
r2 (cos2 θ + sin2 θ) = 3 + 1
r = ± 2
tan θ = \(\frac{-1}{\sqrt{3}}\)
\(2\left(\cos \left(\frac{5 \pi}{6}\right)+i \sin \left(\frac{5 \pi}{6}\right)\right)\)
\(2\left(\cos \frac{5 \pi}{6}+i \sin \frac{5 \pi}{6}\right)\)

iv) – 1 – √3i = r cos θ + r i sin θ
r cos θ = – 1
r sin θ = – √3
r2 (cos2 θ + sin2 θ) = 4
r = ± 2
tan θ = √3
θ = \(\frac{2 \pi}{3}\)
Hence 2 (cos \(\frac{2 \pi}{3}\) + i sin \(\frac{2 \pi}{3}\)).

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Question 2.
Simplify – 2i (3 + i) (2 + 4i) (1 + i) and obtain the modulus of that complex number.
Solution:
z = – 2i (6 + 12i + 2i – 4) (1 + i)
= – 2i (2 + 14i) (1 + i)
= – 2i (2 + 2i + 14i – 14)
= – 2i (- 12 + 16i)
= 24i + 32 = 8 (4 + 3i)
| z |2 = 64.25
| z | = 8 × 5 = 40.

Question 3.
i) If z ≠ 0 find Arg z + Arg \(\overline{\mathbf{Z}}\).
ii) If z1 = – 1 and z2 = – i then find Arg(z1z2)
iii) If z1 = – 1 and z2 = i then find Arg \(\left(\frac{z_1}{z_2}\right)\).
Solution:
i) z = x + iy;
\(\overline{\mathbf{Z}}\) = x – iy
Arg z = tan-1 \(\frac{y}{x}\)
Arg \(\overline{\mathbf{Z}}\) = tan-1 \(\frac{-y}{x}\)
Arg z + Arg \(\overline{\mathbf{Z}}\)
tan-1 \(\frac{y}{x}\) – tan-1 \(\frac{-y}{x}\)
0 when Arg z ≠ n
2n when Arg z = n

ii) z1 = – 1 + 0i; z2 = – i
Arg (z1z2) = Arg z1 + Arg z2
= tan-1 \(\frac{0}{-1}\) + tan-1 \(\frac{(-1)}{0}\)
= π – \(\frac{\pi}{2}\) = \(\frac{\pi}{2}\)

iii) z1 = – 1; z2 = i
Arg \(\left(\frac{z_1}{z_2}\right)\) = Arg z1 + Arg z2
tan-1 \(\frac{0}{-1}\) – tan-1 \(\frac{1}{0}\)
= π – \(\frac{\pi}{2}\) = \(\frac{\pi}{2}\).

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Question 4.
i) (cos 2α + i sin 2α) (cos 2β + i sin 2β) = cos θ + i sin θ then find the value of θ.
ii) If √3 + i = r (cos θ + i sin θ) then find the value of θ in radian measure.
iu) If x + iy = cis α . cis β then find the value of x2 + y2.
iv) If \(\frac{z_2}{z_1}\); z1 ≠ 0 is an imaginary number then find the value of \(\left|\frac{2 z_1+z_2}{2 z_1-z_2}\right|\).
v) If (√3 + i)100 = 299 (a + ib) then show that a2 + b2 = 4.
Solution:
i) (cos 2α + i sin 2α) (cos 2β + i sin 2β) = cos θ + i sin θ
(cos 2α cos 2β – sin 2α sin 2β) + i(sin 2α cos 2β + sin 2β cos 2α) = cos θ + i sin θ
cos 2(α + β) + i sin 2(α + β) = cos θ + i sin θ
θ = 2 (α + β)

ii) √3 + i = r(cos θ + i sin θ)
r cos θ = √3
r sin θ = 1
r2 (sin2 θ + cos2 θ) = 4
r = ± 2
tan θ = \(\frac{1}{\sqrt{3}}\)
θ = \(\frac{\pi}{6}\)

iii) If x + iy = (cos α + i sin α) (cos β + i sin β)
(cos α cos β – sin α sin β) + i(cos α sin β . sinα cos β)
x + iy = cos(α + β) + i sin (α + β)
x = cos (α + β)
y = sin (α + β)
x2 + y2 = 1.

iv) \(\frac{z_2}{z_1}=k i\left|\frac{2+\frac{z_2}{z_1}}{2-\frac{z_2}{z_1}}\right|\)
\(\left|\frac{2+k i}{2-k i}\right|=\frac{\sqrt{4+k^2}}{\sqrt{4+k^2}}\) = 1

v) (√3 + i)100 = 299 (a + ib)
|√3 + i|100 = 299 |a + ib|
(√4)100 = 299 \(\sqrt{a^2+b^2}\)
2100 = 299 \(\sqrt{a^2+b^2}\)
4 = a2+ b2

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Question 5.
i) If z = x + iy and |z| = 1, then find the locus of z.
ii) If Ihe amplitude of (z – 1) is \(\frac{\pi}{2}\) then find the locus of z.
iii) If the Arg \(\overline{\mathbf{z}}_1\) and Arg \(\overline{\mathbf{z}}_2\) are \(\frac{\pi}{5}\) and \(\frac{\pi}{3}\) respectively then find Arg z1 + Arg z2.
iv) If z = \(\frac{1+2 i}{1-(1-i)^2}\) then find Arg (z).
Solution:
i) z = x + iy
|z| = \(\sqrt{x^2+y^2}\)
1 = x2 + y2
Locus is circle.

ii) z – 1 = (x – 1) + iy
\(\tan ^{-1} \frac{y}{x-1}=\frac{\pi}{2}\)
x – 1 = 0, y ≠ 0 also y > 0.

iii) Arg \(\overline{\mathrm{z}}_1\) = \(\frac{\pi}{5}\)
Arg z2 = \(\frac{\pi}{3}\)
Arg \(\overline{\mathrm{z}}_1\) = – Arg z1 = \(\frac{-\pi}{5}\)
Arg \(\overline{\mathrm{z}}_1\) + Arg z2 = \(\frac{\pi}{3}-\frac{\pi}{5}=\frac{2 \pi}{15}\).

iv) z = \(\frac{1+2 i}{1-(1-i)^2}\)
= \(\frac{1+2 i}{1-1+2 i-i^2}\)
= \(\frac{1+2 i}{2 i+1}\) = 1
Arg z = 0.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

II.
Question 1.
Simplify the following complex nunibers and find their modulus.
i) \(\frac{(2+4 i)(-1+2 i)}{(-1-i)(3-i)}\)
ii) \(\frac{(1+i)^3}{(2+i)(1+2 i)}\)
Solution:
i) \(\frac{(2+4 i)(-1+2 i)}{(-1-i)(3-i)}\)

TS Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Exercise 1(c) 1

ii) z = \(\frac{(1+i)^3}{(2+i)(1+2 i)}\)

TS Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Exercise 1(c) 2

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Question 2.
i) If(1 – i) (2 – i) (3 – i) …………. (1 – ni) = x – iy then prove that 2 . 5 . 10 ….. (1 + n2) = x2 + y2.
ii) If the real part of \(\frac{z+1}{z+i}\) is 1,then find the locus of z.
locus of z.
iii) If |z – 3 + i| = 4 determine the locus of z.
iv) If |z + ai| = |z – ai| then find the locus of z.
Solution:
i) (1 – i) (2 – i) (3 – i) ……….. (1 – ni) = x – iy
Taking modulus both sides
|(1 – i)| |(2 – i)| …………… |1 – ni| = |x – iy|
√2 . √5 ………….. \(\sqrt{1+n^2}=\sqrt{x^2+y^2}\)
2 . 5 . ………………… . (1 + n2) = x2 + y2

ii) \(\frac{z+1}{z+i}\)

TS Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Exercise 1(c) 3

= k1 + k2i
Here k1 = 1
x2 + y2 + x + y = x2 + (y + 1)2
x2 + y2 + x + y – x2 + y2 + 2y + 1
x – y = 1

iii) |z – 3 + i| = 4
|(x – 3) + 1(y + 1)| = 4
(x – 3)2 +(y + 1)2 = 16
x2 + y2 – 6x + 2y + 10 = 16
x2 + y2 – 6x + 2y – 6 = 0

iv) If |z+ ai| = |z – ai|
|x + (y – a)i| = |x + (y – a)i|
x2 + (y + a)2 = x2.(y – a)2
y = 0.

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Question 3.
lf z = x + iy and if the point P in the Argand plane represents z, then describe geometrically the locus of P satisfyIng the equations
i) |2z – 3| = 7
ii) |z|2 = 4 Re (z + 2)
iii) |z + i|2 – |z – i|2 = 2
iv) |z + 4i| + |z – 4| = 10
Solution:
i) |2z – 1| = 7
|2(x) – 3 + 2yi| = 7
\(\sqrt{(2 x-3)^2+4 y^2}\) = 7
4x2 – 12x + 9 + 4y = 49
4x2 + 4y2 – 12x – 40 = 0
x2 + y2 – 3x – 10 = 0.
Centre (\(\frac{3}{2}\), 0) radius = \(\frac{7}{2}\).

ii) |z|2 = 4 Re (z + 2)
x2 + y2 = 4 (x + 2)
x2 + y2 – 4x – 8 = 0
Circle centre (2, 0),
Radius = √12 = 2√3.

iii) |z + i|2 – |z – i|2 = 2
(x)2 + (y + 1)2 – x2 – (y – 1)2 = 2
4y = 2
2y = 1
⇒ 2y – 1 = 0.
Line parallel to x-axis.

iv) |z + 4i| + |z – 4i| = 10
|(x + (y + 4)i)| + |(x + (y – 4)i| = 10

TS Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Exercise 1(c) 4

\(\sqrt{x^2+(y+4)^2}+\sqrt{x^2+(y-4)^2}\) = 10
x2 + (y + 4)2 = (10 – \(\sqrt{x^2+(y-4)^2}\))2
x2 + (y + 4)2 = 1oo + x2 + (y – 4)2 – 20\(\sqrt{x^2+(y-4)^2}\)
Solving we get
25x2 + 9y2 = 225 is ellipse
centre (0,0),
eccentricity = e = \(\sqrt{\frac{a^2-b^2}{a^2}}\)
= \(\sqrt{\frac{25-9}{25}}\)
e = \(\frac{4}{5}\).

TS Board Inter 2nd Year Maths 2A Solutions Chapter 1 Complex Numbers Ex 1(c)

Question 4.
If z1, z2 are two non-zero complex numbers satisfying
i) |z1 + z2| = |z1| + |z2| then show that Arg z1 – Arg z2 = 0.
ii) If z = x + iy and the point P represents z in the Argand plane and \(\left|\frac{\mathbf{z}-\mathbf{a}}{\mathbf{z}+\mathbf{a}}\right|\) = 1. Re(a) ≠ 0 then find the locus of P.
Solution:
i) |z1 + z2| = |z1| + |z2|
Squaring both sides
|z1 + z2|2 = (|z1| + |z2|)2
(z1 + z2) \(\left(\bar{z}_1+\bar{z}_2\right)\) = |z1|2 + |z2|2 + 2|z1| |z2|
z1\(\bar{z}_1\) + z2\(\bar{z}_2\) + z1\(\bar{z}_2\) + z2\(\bar{z}_1\) = |z1| + |z2| + 2|z1| |z2|
(x1 + iy1) (x2 – iy2) + (x2 + iy2) (x1 – iy1) = 2
2 (x1x2 + y1y2) + i (y1x2 – x1y2 + x1y2 – y1x2) = 2 \(\sqrt{\mathrm{x}_1^2+\mathrm{y}_1^2} \sqrt{\mathrm{x}_2^2+\mathrm{y}_2^2}\)
Squaring on both sides we get
(x1x2 + y1y2)2 = (x12 + y12) (x22 + y22)
(x1y2 – y1x2)2 = 0
\(\frac{\mathrm{y}_2}{\mathrm{x}_2}=\frac{\mathrm{y}_1}{\mathrm{x}_1}\)
∴ Arg z1 – Arg z2 = 0.

ii) |z – a| = |z + a|
Squaring on both sides (x – a)2 + y2 = (x + a)2 + y2
4xa = 0
x = 0
Parallel to y – axis.

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Regular practice with TS 6th Class Science Bits with Answers 3rd Lesson Rain: Where Does it Come From? improves students’ confidence and readiness for assessments and examinations.

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 1.
Raining season in our state with monsoons is
A) June – September
B) January March
C) November – September
D) March – April
Answer:
A) June – September

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 2.
Fill up the blank.
TS 6th Class Science Bits 3rd Lesson Rain Where Does it Come From 1
A) cloud
B) ice
C) fog
D) water
Answer:
D) water

Question 3.
This is the form of water vapour
A) Gaseous
B) Solid
C) Liquid
D) All
Answer:
A) Gaseous

Question 4.
Changing of water into water vapour
A) Condensation
B) Sublimation
C) Evaporation
D) Liquifaction
Answer:
C) Evaporation

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 5.
Conversion of water vapour into water is called
A) Condensation
B) Evaporation
C) Sublimation
D) Liquification
Answer:
A) Condensation

Question 6.
The solid form of water
A) gas
B) liquid
C) ice
D) above all
Answer:
C) ice

Question 7.
If water receives more heat it
A) evaporates fast
B) condenses fast
C) solidifies fast
D) none of these
Answer:
A) evaporates fast

Question 8.
Kavitha wants to dry the washed clothes. Where do they immediately get dry?
A) Under the fan
B) In the sunlight
C) In the shade
D) In the dark room
Answer:
B) In the sunlight

Question 9.
Dew formation on grass is due to
A) Evaporation
B) Condensation
C) Melting
D) Solidification
Answer:
B) Condensation

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 10.
In winter when Ramu speaks, some smoke like vapour comes out from his mouth. Can you imagine the reason?
A) Condensation
B) Evaporation
C) Decantation
D) Water vapour
Answer:
D) Water vapour

Question 11.
Water → ? → Clouds → Rains. Find out the missing one.
A) Sublimation
B) Condensation
C) Liquification
D) Evaporation
Answer:
D) Evaporation

Question 12.
As we move away from the surface of the earth the air becomes
A) hot
B) cooler
C) ice
D) humid
Answer:
B) cooler

Question 13.
These monsoons occur during June to September.
A) South-West
B) North-West
C) East – North
D) South-North
Answer:
A) South-West

Question 14.
The monsoons occur during November and December
A) South-North
B) East-West
C) North-East
D) West – South
Answer:
C) North-East

Question 15.
The period of South-West monsoons
A) October – January
B) June – September
C) February – May
D) April – July
Answer:
B) June – September

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 16.
North-East monsoon occurs in
A) June to September
B) August to October
C) November and December
D) January and February
Answer:
C) November and December

Question 17.
Certain amount of rain water seeps into the ground and becomes
A) Ground water
B) Soil erosion
C) Forestation
D) Deforestation
Answer:
A) Ground water

Question 18.
i) South-West monsoon – November and December
ii) North-East monsoon – June to September
A) Both true
B) Both false
C) j – true
D) j – false 2- true
Answer:
B) Both false

Question 19.
What happens when water is heated in high temperature?
A) Water cycle
B) Evaporation
C) Cloud
D) Solid state
Answer:
B) Evaporation

Question 20.
If rain falls along with pieces of ice, they are called
A) Rain stones
B) Ice rains
C) Flail stones
D) Acid rains
Answer:
C) Flail stones

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 21.
What is the example for solid form of water?
A) Water in a pot
B) Water in the clouds
C) Boiling water
D) Ice cubes
Answer:
D) Ice cubes

Question 22.
If we don’t have the process of evaporation
A) We never see rains
B) We can not cook the food
C) We never see the seasons
D) All the above are correct
Answer:
D) All the above are correct

Question 23.
If water vapor = Evaporation then rain =?
A) Sublimation
B) Condensation
C) Solidification
D) Allocation
Answer:
B) Condensation

Question 24.
Find out the odd one
A) Evaporation
B) Condensation
C) Crystallisation
D) Water cycle
Answer:
C) Crystallisation

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 25.
Identify the correct pair.
A) Water changing to vapour – Sublimation
B) Water changing to ice – Condensation
C) Water changing to vapour – Evaporation
D) Ice changing into water – Evaporation
Answer:
C) Water changing to vapour – Evaporation

Question 26.
Solid form of water is ice, then gaseous form of water is
A) Cubes
B) Rain
C) Vapour
D) Stones
Answer:
C) Vapour

Question 27.
Water drops on grass plants can be observed in this season:
A) Rain season
B) Summer season
C) Winter season
D) Spring season
Answer:
C) Winter season

Question 28.
Read the passage and answer the questions.
Often big drops of water solidify into ice and fall as pieces of ice known as hailstones. Hail stones are
A) Clouds
B) Ice pieces as rain
C) Clouds fall as rain
D) Cool breeze as rain
Answer:
B) Ice pieces as rain

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 29.
Read the given lines and answer the questions.
Water in rivers and lakes evaporates continuously from their surface.This evaporated water is formed as clouds.
Water vapour from rivers and lakes is formed due to heat supply by …
A) Heat geasers
B) Volcanoes
C) Winter cool
D) Sunlight
Answer:
D) Sunlight

Question 30.
TS 6th Class Science Bits 3rd Lesson Rain Where Does it Come From 2The given diagram shows
A) condensation
B) evaporation
C) solidification
D) rains
Answer:
B) evaporation

Question 31.
The given diagram indicates
TS 6th Class Science Bits 3rd Lesson Rain Where Does it Come From 3
A) Vapourisation
B) Solidification
C) Evaporation
D) Condensation
Answer:
D) Condensation

Question 32.
Choose the correct sequence of events that occur in the water cycle based on the given picture.
TS 6th Class Science Bits 3rd Lesson Rain Where Does it Come From 4
A) Evaporation → Condensation → Water
B) Water → Condensation → Evaporation
C) Condensation → Water → Evaporation
D) Water → liquid → Clouds
Answer:
B) Water → Condensation → Evaporation

Question 33.
Water cycle gets disturbed due to the following reason:
A) Global warming
B) Pollution
C) Deforestation
D) All the above
Answer:
D) All the above

Question 34.
What is missing in the water cycle?
TS 6th Class Science Bits 3rd Lesson Rain Where Does it Come From 5
A) Stars
B) Sun
C) Air
D) Moon
Answer:
B) Sun

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 35.
Deforestation and pollution from factories cause
A) afforestation
B) condensation
C) globalisation
D) global warming
Answer:
D) global warming

Question 36.
Rama wanted to dry this towel with in a short time. But there is no sun light.What might had he done for fast drying in that situatIon?
A) He dried the towel under fan.
B) He dried under water.
C) He dried under bench.
D) All the above
Answer:
A) He dried the towel under fan.

Question 37.
Acid rain is the combination of
A) Sulphur dioxide and Nitrogen dioxide
B) Carbon dioxide and Carbon monoxide
C) Nitrogen dioxide and Carbon dioxide
D) Sulphur dioxide and Carbon dioxide
Answer:
A) Sulphur dioxide and Nitrogen dioxide

Question 38.
If the rain drops are very small, they are collectively termed
A) drizzle
B) snow
C) monsoon
D) fog
Answer:
A) drizzle

TS 6th Class Science Bits 3rd Lesson Rain: Where Does it Come From?

Question 39.
The speed of rain drops is
B) 2-4 mts/sec
B) 15-20 mts/sec
C) 5 – 10 mts/sec
D) 3-8 mts/sec
Answer:
D) 3-8 mts/sec

TS 6th Class Science 13th Lesson Questions and Answers Telangana – Learning How to Measure

TS Board TS 6th Class Science Study Material Pdf 13th Lesson Learning How to Measure Textbook Questions and Answers.

Learning How to Measure – TS 6th Class Science 13th Lesson Questions and Answers Telangana

Improve Your Learning

Question 1.
What is the smallest distance that you can measure with a centimeter scale ? (Conceptual Understanding) 2 M
Answer:

  1. The smallest distance that we can measure with a centimeter scale is ‘one millimeter’ (1 mm).
  2. 1 centimeter = 10 millimeters or 1 cm – 10 mm

TS 6th Class Science 13th Lesson Questions and Answers Telangana - Learning How to Measure

Question 2.
Are we able to measure the thickness of a metal wire using a scale ? Explain. (Conceptual Understanding) 2 M
Answer:

  1. It is not possible to measure the thickness of a metal wire using a scale.
  2. The smallest length we can measure with a centimeter scale is “one millimeter.
  3. We cannot measure “fraction of a millimeter.

Question 3.
A school hall measures 20 m in length and 15 m in breadth. Find its area. (Conceptual Understanding) 2 M
Answer:
Length of school hall (l) = 20 m
Breadth of school hall (b) = 15 m
Area of school hall (A) = lengh × breadth (l × b)
= 20 m × 15 m
∴ A = 300 m2 = 300 sq.m

Question 4.
Ramu’s father had a rectangular plot of length 60 ft and breadth 50 ft. He built a house occupying length 40 ft of the plot and breadth 40 ft and in the remaining area he planned a garden. Can you help Ramu to find out the area of his garden? (Conceptual Understanding) 2M
Answer:
length of garden = length of the plot – length of house
= 60 ft – 40 ft = 20 ft.
Breadth of garden = breadth of the plot – breadth of house
= 50 ft – 40 ft = 10 ft.
Area of his garden = length x breadth
= 20 ft x 10 ft = 200 ft2.

Question 5.
Match the following (Conceptual Understanding) 2M
Answer:

AB
(a) liter21) 10000 m2
(b) A meter32) 1000 ml
(c) A kilometer43) 100 cm
(d) A centmeter54) 1000 m
(e) 1 hectare (nearly 2.5 Acres)15) 10 mm

Question 6.
Milliliter is a unit for measuring …………….. (Conceptual Understanding) 2M
Answer:
Volume

Question 7.
For measuring long distances we can use …………… as a unit. (Conceptual Understanding) 2M
Answer:
Kilometer

TS 6th Class Science 13th Lesson Questions and Answers Telangana - Learning How to Measure

Question 8.
What method will you adopt to measure the volume of a banana ? Explain. (Experimentation andfield investigation) 4 M
Answer:
Banana has an irregular shape. So I follow the method, “to measure volume of irregular solids using a measuring cylinder”.

Explanation:

  1. A measuring cylinder is taken.
  2. It is half – filled with water.
  3. The volume of water is recorded. It is, ‘a’ ml.
  4. The banana is tied with a fine cotton thread.
  5. The banana is gently put in the water so that it is completely immersed in water.
  6. The level of water in the cylinder rises.
  7. The new volume of water is recorded. It is, ‘b’ ml.
    ∴ Volume of the banana = b ml – a ml = (b – a) ml.

Question 9.
Identify incorrect statements among the following and rewrite them with necessary corrections : (Asking questions and making hypothesis) 8M
a) One square meter is equal to 100 square centimeters
b) The appropriate unit for reporting the volume of a cylindrical rod is cm2, (square centimeter)
c) The appropriate instrument to measure the thickness of a 25 paise coin is tailor’s tape
d) A measuring cylinder can directly measure the volume of solids.
Answer:

Given statementCorrected statement
a) One square meter is equal to 100 square centimeters1. 1 m2 = 10,000 cm2

meter x meter = 100 cm x 100 cm,

m2 = 10,000 cm2

 

2. ∴ One square meter is equal to ten thousand square centimeters.

b) The appropriate unit for reporting the volume of a cylindrical rod is cm2, (square centimeter)b. The appropriate unit for reporting the volume of a cylindrical rod is cm3, (cubic centimeter)
c) The appropriate instrument to measure the thickness of a 25 paise coin is a tailor’s tape(c) Wrong.

1. A number of these coins (say, 10) are placed one upon the other.

2. The total thickness is measured with a scale.

3. It is divided by the no. of coins.

4. Then we get the thickness of single coin.

d) A measuring cylinder can directly measure the volume of solids.d. No. We require a measuring cylinder and a liquid in which the given solid doesn’t dissolve. (For details, refer Q. 8)

Question 10.
How will you measure the area of your palm using graph paper ? Explain.
Answer:
Our palm is measured by using a graph paper.
Method of finding the area of palm using a graph paper: (Experimentation andfield investigation) 8M

  1. Palm is placed on a graph paper.
  2. The boundary of the palm is marked on a graph paper.
  3. Palm is removed. We have the outline or boundary of the palm on the graph paper.
  4. The number of complete squares (each of 1 cm2 area) lying inside the boundary are counted.
  5. Also, those squares lying inside the boundary, which are half or greater than half are counted.
  6. This is added to the number of complete squares.
  7. This total number gives the area of the palm. If this number is n, Area of palm = n cm2

TS 6th Class Science 13th Lesson Questions and Answers Telangana - Learning How to Measure

Question 11.
Measure the volume of “Kalakanda” (sugar crystal) and piece of “Patika” (alum) – Record your measurements in given table 8M
Answer:

Name of the studentVolume of KalakandaVolume of Patika

a) Are all the volumes of Kalakanda equal ?
b) Are all the volumes of Patika equal ?
c) If not, state the possible reasons.

Ask your friends to measure volumes of the same pieces of Kalakanda and Patika and record the values .(Experimentation andfield investigation)
Answer:
1. Both Kalakanda and Patika are soluble in water. So water can’t be used in the measuring. Both are insoluble in liquids like kerosene. So kerosene is used.

2. Their volumes are found, from the volume of kerosene displaced by them in a measuring cylinder.The values are tabulated as under.

Name of the studentVolume of KalakandaVolume of Patika
Kartik28.9 cm326.4 cm3
Deepu28.8 cm326.5 cm3
Rahim30.0 cm326.5 cm3
Sitalu30 cm326.4 cm3

(a) No
(b) No
(C) Possible reasons are :
1) In the measuring Jar, we have to read the marking at the lowest point of the concave surface of liquid. For that, we must bring our eyes in line with this level and then read it. If this procedure is not followed well, we get error while noting the reading.

TS 6th Class Science 13th Lesson Questions and Answers Telangana - Learning How to Measure 1

2) Human error, while taking down the reading on paper.

3) These two substances are not hard like stones. They are brittle. So naturally some amount of it gets lost, as many students handle them.

TS 6th Class Science 13th Lesson Questions and Answers Telangana - Learning How to Measure

Question 12.
A carpenter who makes wooden furniture needs accuracy in measurements. Do you ever notice how he measures ? How would you appreciate him? (Appreciation and Aesthetic sense and values) 4M
Answer:

  1. As the carpenter is a practical worker. He always be cautious on measuring the wood.
  2. Carpenter takes measurements very accurately and nearest to a millimeter.
  3. He puts his mind on the job and concentrates on the measurements to design beautiful furniture.
  4. Carpenters mostly depend on a right angled strip, a steel tape, pencil etc., to measure the wood.

Question 13.
Make a visit to panchayat office. Collect information, how VRO measure areas of agricultural lands in your village. Prepare a questionnaire for this. (Information skills and projects) 4 M

  1. The panchayat office VRO uses metal chain tape to mark the boundaries of house land or agricultural fields.
  2. The measuring chains are made in links.
  3. It is not possible to measure the largest fields with tape. So these metal chain made tapes are used.

Questionnaire:

  1. What is the advantage of using chain instead of tape ?
  2. Is it accurate to measure the fields with metal chain ?
  3. Are there any measuring devices other than metal chain ?

Question 14.
Collect any Invitation card with envelope. Find out the difference between measurements of card and cover. Write down the process that you follow. (Experimentation andfield investigation) 4M
Answer:

  1. The cover is put on a flat surface (a table)
  2. A metre scale is taken.
  3. The scale is placed exactly along the length of the cover.
  4. Zero point on the scale is made to coincide with the starting point of the cover.
  5. The eye is placed vertically above the point of coincidence of scale where the measurement is to be taken.
  6. The length of the cover is measured more than two times. Then the average reading is taken. A similar procedure is followed to find the breadth of the cover. It is found that, the length and breadth of the card are slightly less than those of the cover.

TS 6th Class Science 13th Lesson Questions and Answers Telangana - Learning How to Measure

Question 15.
The distance between numbers in a clock is accurately same. List out the things that you observe in your surroundings with accurate distance between them. (Information skills and projects) 4M
Answer:
There are number of things in our surroundings with accurate distance between them. Some of them are :

  1. Pillars in a common hall
  2. Iron rods in a window
  3. Floor – designing
  4. Wings of a fan
  5. Stripes on a cloth
  6. Pillars in a compound wall, etc.

Question 16.
Try to imagine the area of CD, sim card, mobile phone, then find out the area of the above by using graph paper. Compare the values of your guess with graph paper measurement. Which thing is closely related to your guess?
Answer:
Area of mobile phone. It is rather easier to guess the length and breadth of a mobile phone, which has a rectangular shape and is medium in size.

TS 6th Class Science 13th Lesson Notes – Learning How to Measure

  • Palm, Hand-span, foot-span, cubit, and stride are some conventional methods used earlier to measure lengths and small distances.
  • The above conventional unit of measurement is not accurate. Because the length of the unit changes from person to person.
  • The system of units now used is known as the International system of units (SI units).
  • ‘Meter’ is the standard unit for measuring length.
  • Meter scale is a standard instrument to measure length.
  • Large distances can be measured in kilometers.
  • Area is the measure of the extent of plane surface occupied by an object.
  • Generally we measure area in square meters or square centimeters etc.
  • Volume is a measure of the extent of space occupied by a body.
  • Volumes of liquids can be measured using measuring cylinders.
  • A measuring cylinder is marked from bottom to the top.
  • Volume of liquids is measured in litres or milliliters.
  • Volume of solids is measured in cubic meters, cubic centimeters, etc.
  • Using a measuring cylinder and a liquid (Ex: water), we can measure the volume of an irregular solid.
  • Measure : The comparison of an unknown quantity with some known quantity is said to be measurement.
  • Standard Unit : Internationally accepted unit is called standard unit and internationally accepted instrument is called standard instrument. Eg: Gram, litre, metre.
  • Area : Area is a measure of the extent of the plane surface occupied by an object. Area is measured in square meters or square centimeters.
  • Volume : Volume is a measure of the extent of space occupied by a body. Volume of solids is measured in cubic meters, or cubic centimeters. Volume of liquids is measured in litres or millilitres.
  • Regular surface : If body is in regular shape like square, rectangle then the surface of the body is said to be regular surface.
  • Irregular surface : 11 body is in irregular shape like banana peel or leaf, then the surface of the body is said to be irregular surface.
  • Measuring cylinder: It is a specially designed instrument for measuring volume of liquids such as water, milk, etc.
  • Graph paper It is a paper that has small squares printed on it, so that we can use it for drawing graphs.

TS 6th Class Science 12th Lesson Questions and Answers Telangana – Simple Electric Circuits

TS Board 6th Class Science Guide Telangana 12th Lesson Simple Electric Circuits Textbook Questions and Answers.

Simple Electric Circuits – TS 6th Class Science 12th Lesson Questions and Answers Telangana

Improve Your Learning

Question 1.
What is an electric circuit ? Explain with a diagram. (Communication through diagram and Model Making) 8 M
Answer:

  1. Figure shows a closed circuit. It consists of a cell, a bulb and connecting wires.
  2. An electric circuit provides a complete path for electricity to flow between the cell and the bulb.
  3. A similar circuit exists for an electric bulb which we use in our houses.
  4. The two electric supply wires are connected to the two terminals of the bulb through a switch.
  5. When the switch is closed the circuit provides complete path for electricity.

TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits

Question 2.
What are the parts of a torch-light ? (Conceptual Understanding) 4M
Answer:
The parts of a torch-light are

  1. A hollow cylindrical barrel (or plastic casing)
  2. Electric cells
  3. Bulb
  4. Side switch
  5. Glass cover (a circular glass plate)
  6. Reflector
  7. Metal spring

Question 3.
In a bulb the part which gives us light is : (Conceptual Understanding) 2M
(a) Metal base
(b) Glass chamber
(c) Filament
(d) Terminals.
Answer:
(c) (Filament)

Question 4.
Classify the following into conductors and insulators : (Conceptual Understanding) 2 M
(a) Water
(b) Plastic pen
(c) Pencil lead
(d) Dry cotton cloth
(e) Wet cotton cloth
(f) Dry wood
(g) Wet wood
Answer:

ConductorsInsulators
WaterPencil lead
Wet cotton clothPlastic pen
Wet woodDry cotton cloth
Dry wood

Question 5.
Niharika observed an electrician repairing a street light wearing gloves on his hand. She asked him some questions. What would be those questions ? (Asking questions and making hypothesis) 4M
Answer:
She might have asked the following questions.

  1. You covered your hands with something. What are they ?
  2. What is their purpose ?
  3. Can’t you work, without wearing them ? Why ?
  4. What is the material of those gloves ?
  5. Can we have gloves made of other materials ?
  6. Can we work with them in summer as well as rainy seasons ? Why ?

TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits

Question 6.
In activity 4 we observed some situations where the torch bulb glows. Niharika challenged her friends that she could make the bulb not glow even with the cells kept in proper position. What would she have done? (Experimentation andfield investigation) 4M
Answer:
If the electric circuit is broken somehow, the bulb does not glow.
This can be done in some ways :

  1. Use of fused bulb
  2. Use of exhausted batteries
  3. Sliding switch to OFF position
  4. Turning the cap anti-clockwise, to break the contact between the bulb and the cells.

Question 7.
Connect a circuit as shown in the following diagram. (Experimentation andfield investigation / Communication through diagram and Model Making) 8M
a) Does the bulb glow? Why?
TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits 1
Answer:
No. The bulb does not glow.

Reason : For the circuit to complete, the +ve terminal of one battery should be connected to the -ve terminal of the other battery. But here, it is not so. The +ve terminal of one battery is connected to the +ve terminal of the second battery. So the circuit is not completed. Electricity does not flow. So the bulb does not glow.

b) Draw the circuit so that the bulb glows.
Answer:
TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits 2

c) Verify it by connecting cells and bulb as per the circuit drawn.
Answer:
Under teacher’s observation verify the above activitv.

Question 8.
What will happen if the cells in a torch are arranged as shown in the following figure ? Why ? (Experimentation andfield investigation) 8M
TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits 3
Answer:
If the cells in a torch are arranged as shown in the above picture. The bulb does not glow.

Reason : The electric circuit is not complete. The +ve terminal of one battery should be connected to the -ve terminal of the second battery. Then only electricity flows in the circuit.

TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits

Question 9.
Draw a circuit diagram showing a cell, switch and a bulb.
(or)
Draw a diagram of a simple circuit with the material given. (Dry cell, electric wires, rubber band, bulb, switch) (Communication through diagram and Model Making) 8M
Answer:
TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits 4

Question 10.
A circuit is connected with a cell, bulb and a switch, but the bulb is not glowing. Write all possible reasons for this. (Asking questions and making hypothesis) 2M
Answer:

  1. The cell used might have been totally discharged.
  2. The bulb taken might have been fused.
  3. The switch arranged may not be in touch with the wires as expected.
  4. There may be a break in the continuity of the wires taken.

Question 11.
You have studied the story of Thomas Alva Edison. Write a note appreciating his efforts in inventing the bulb ? (Appreciation and Aesthetic sense and values) 4M
Answer:

  1. Edison was of an inquisitive nature and he learned science by performing experiments himself.
  2. This is a message to the generations that ‘learning by doing” is the best way of knowing things.
  3. An intelligent scientist like Edison had to work hard for many years before he could make a bulb.
  4. This is another example for all the students to work hard continuously to reach their goals.
  5. Life would be unimaginable if Edison had not invented electric bulb.
  6. Success never comes sudden. It comes only after continuous attempts.

TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits

Question 12.
List the daily activities in which we use electricity. (Application to daily life and concern to Biodiversity) 4 M
(Or)
Where do we use electricity for different works in our daily life prepare a list.
Answer:
Daily activities in which we use electricity :

  1. To operate pumps that lift water from wells or from ground level to the roof-top tank.
  2. To light over houses, roads, offices, markets and factories.
  3. To operate electrical appliances like washing machine, radio, TV, air-conditioner, fan, cooker, iron box etc.
  4. Electric cells are also used in alarm clocks, wrist watches, transistor radios, toys, cameras and many other devices.

Question 13.
If you put the switch on, a light will glow, a fan will rotate, an iron box heats up etc. All these different functions will be performed by electricity. How do you feel about the comforts given by this great invention to human beings. ? (Appreciation and aesthetic sence and values) 4 M

  1. In the modern society, ‘electricity’ has become an essential ‘commodity’.
  2. It plays a very important role in shaping the modern society.
  3. Life is hard to imagine without ‘electricity’.
  4. From the poor to the rich, electricity is a ‘must1 to each.
  5. Now we are enjoying the fruits of the latest technological developments.
  6. It would not have been possible without the use of ‘electricity1.
  7. It made it possible to turn the vast world into a small village.

Question 14.
Write a list of electrical appliances in your house. Classify them as follows. (Conceptual Understanding) 4 M
Answer:

Works with cell as a sourceWorks with electric current as a sourceWorks with both cell and electric current as a source
1) Torch light1) Fan1) Tape recorder
2) Transistor2) Washing machine2) Fan (small size)
3) Wrist watch3) Electric motor3) Transistor
4) Toys4) Cooker4) Land telephone
5) Wall clock5) Iron box5) Laptop
6) Remote of a TV6) Vacuum cleaner
7) Mosquito repellent
8) TV
9) Refrigerator
10) Air conditioner
11) Inverter
12) Light bulbs
13) Sewing machine

Question 15.
Connect circuits as shown in the following figure. Write your observation in each each case. (Communication through diagram and Model Making) 4 M
TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits 5

  1. +ve poles of the two cells are connected directly to each other. So the circuit is not completed. Current does not flow in it. Hence the bulb does not glow.
  2. The +ve pole of one battery is connected to the -ve pole of the other battery. Circuit completes, current flows, bulb glows.
  3. Connections are all correct. Current flows. Bulb glows.
  4. Connections are all correct. Current flows. Bulb glows. brilliantly

TS 6th Class Science 12th Lesson Questions and Answers Telangana - Simple Electric Circuits

Question 16.
Match the following : (Conceptual Understanding) 2M
Answer:

Column AColumn B
1) CellB(A) Conductor
2) SwitchD(B) Source of electricity
3) Safety pinA(C) Filament
4) EraserE(D) To close or open a circuit
5) Glowing of bulbC(E) Insulator

 

TS 6th Class Science 12th Lesson Notes – Simple Electric Circuits

  • Electricity is used for many domestic and industrial activities.
  • Electricity helps us to continue working at night.
  • A torch-light may be used for providing light.
  • In a torch-light, cell is the source of electrical energy.
  • An electric cell has two terminals, positive(+) and negative(-).
  • An electric bulb glows when electric current passes through it.
  • If the bulb has fused, it does not glow.
  • In a closed circuit, the electric current passes from one terminal of the cell to the other terminal.
  • Torch light consists cell, bulb and switch.
  • Substances which allow electric current to flow through them are known as conductors.
  • Substances which do not allow electric current to flow through them are known as insulators.
  • Materials like hair pin, iron nail, metal bangle, safety pin, sewing needle, coin, aluminium foil etc., are conductors of electricity.
  • Materials like eraser, plastic scale, piece of paper, piece of glass bangle, paper clip, piece of chalk, cork, wooden block, candle, thermocole are non – conductors of electricity.
  • The electric bulb was invented by Thomas Alva Edison.
  • Our body is a conductor of electricity.
  • Electricity : It is a form of energy.
  • Cell : A source of electrical energy is called a cell.
  • Bulb : Bulb consists a filament, two terminals which gives light.
  • Fused bulb : If a filament in a bulb doesn’t glow, the bulb is called fused bulb.
  • Terminals : A terminal is one of the points where electricity: enters or leaves it.
  • Filament : The part of the bulb that glows is called a filament.
  • Switch : A switch helps us to allow or break the flow of electricity in a circuit.
  • Circuit : A circuit is a complete path which an electric current can flow around.
  • Conductor : Substance which allows the flow of electricity through it is cafli’d conductor. Eg : Hair pin, iron nail.
  • Insulator : Substance which does not allow the flow of electricity through it is called insulator. Eg: Eraser, plastic scale, wood.
  • Tungsten : It is a greyish white metal, which is used in bulb as filament.

TS 6th Class Science 11th Lesson Questions and Answers Telangana – Water in Our Life

TS Board 6th Class Science Guide Telangana 11th Lesson Water in Our Life Textbook Questions and Answers.

Water in Our Life – TS 6th Class Science 11th Lesson Questions and Answers Telangana

Improve Your Learning

Question 1.
How can you say water is necessary for us ? (Appreciation and aesthetic sence and values) 2M
Answer:

  1. Water is the main factor responsible for life on earth.
  2. Water is necessary for the life process to go on. So we cannot survive without water even a single day.
  3. Water is essential for germination, to generate electricity and for irrigation of the crops.

TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life

Question 2.
Ravi wants to know the measuring units of water. What will you tell him ? (Experimentation andfield investigation) 4M
Answer:
There are some specific units of measurement of volumes of liquids like water.

  1. Litres and millilitres : It is commonly used to measure liquids in shops and houses.
  2. Gallons : Usually used to indicate the quantity of water in water tanks.
  3. Feet: Water levels in the reservoirs is measured in feet.
  4. Cusecs (Cubic centimeters / sec): Water released from dams and projects is measured in cusecs.

Question 3.
Why do people need protected drinking water scheme ? (Conceptual Understanding) 4M
Answer:

  1. Supplying pure drinking water in large quantities in villages and cities is called “Protected drinking water scheme”.
  2. The water we get from certain sources is not fit for drinking. It is mixed with different impurities. It is called polluted water.
  3. If we drink polluted water, we may suffer from dreadful diseases.
  4. If one drinks water that contains a lot of fluorine, one will get disease of bones called fluorosis.
  5. So water is purified and then only sent to the houses using motors. This water does not harm us.

TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life

Question 4.
List out the activities that we perform in our daily life that consume water.
(or)
For what purposes do we need water in our daily life ? (Conceptual Understanding) 4M
Answer:
We need water to perform several day-to-day activities like

  1. cooking food
  2. washing clothes
  3. cleaning utensils,
  4. bathing
  5. brushing
  6. cleaning floor, toilets and pipes flushing etc.

Question 5.
In ………. season we face severe water scarcity. Give your reason. (C. U) 2M
Answer:

  1. During summer surface water evaporates.
  2. Then the water in tanks, rivers, ponds, canals, etc., dries up.
  3. The level of ground water also falls very much.
  4. Then there will be severe scarcity of water.

Question 6.
The nature of sea water is ………. (Conceptual Understanding) 2M
(a) Salty
(b) Tasteless
(c) Odourless
(d) Sweet
Answer:
(a) Salty

Question 7.
If we use water in the same way what will happen in future? Write your suggestions to prevent water wastage. (Asking questions and making hypothesis) 8M
Answer:

  1. We are wasting water for many unnecessary things.
  2. Over usage of water leads to water scarcity in many parts of the world in future. Suggestions to prevent water wastage :
    • Do not allow overflow of water tank when it is being filled.
    • We have to reduce the amount of water in our day-to-day activities.
    • The leakage of tap water and pipes should be immediately attended.
    • Do not leave the tap running while using for any purpose.

TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life

Question 8.
Everyone should remember that water is to be used in judicial manners. Prepare a map of your village showing different water sources. 8M (Communication through drawing and Model making)
Answer:
D:\Content\SR Class 6 SCience (TS)\imgs\TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life 1.png

Question 9.
Make a pamphlet on “Don’t waste water”. Display it on wall magazine. (Communication through drawing and Model making) 8M
Answer:

PAMPHLET
DON’T WASTEWATER

  1. Water is essential for the survival of life on this earth.
  2. We can’t live a single day without water.
  3. On our earth, the available water is quite limited.
  4. There is over usage of water every where : In human activities, industries, irrigation, etc.
  5. Unwise pumping of water causes depletion of ground water levels.
    This results in droughts.
  6. Remember ! Water saved is water conserved.
  7. Control population, reduce water consumption and also avoid wastage of water.
  8. Save water drop by drop and preserve it for future generations.
  9. Remember, “Water is quite precious”. Name of the publishers : Green Camp Volunteers No of copies 500.

Question 10.
Collect information about water related games and make a scrap book. (Information Skillls and Projects) 8M
TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life 2
Answer:
Following are some water related games
1. Swimming in water
2. Diving
3. Yachting

TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life

Question 11.
Find out the relationship between water shortage and drought. (Application to daily life and concern to biodiversity) 2M
Answer:

  1. If there is no rain for a long period (4 to 5 years), it may cause droughts.
  2. This leads to water shortage.
  3. The intensity of rainfall influences the availability of fresh water resources.

Question 12.
Justify the statement “Droughts and floods are a result of actions made by man”. Investigate your reasons. (Application to daily life and concern to Biodiversity) 4M
Answer:

  1. Indiscriminate and unwise pumping of water causes droughts. Sometimes lesser rainfall also causes droughts.
  2. Causes of floods :
    • Lack of proper outlets for the rain water, when it rains heavily.
    • Lack of sufficient number of dams across the rivers, to control flood water and allow the excess water flow into the seas.
    • The disposable materials are generally thrown away. These materials obstruct water flow in canals and drainages during heavy rains. It causes floods. So these are all human faults (mistakes) that lead to droughts and floods.

Question 13.
Aravind never forgot to switch off water pumping motor in time. Do you support him ? Why ? (Appreciation and aesthetic sence and values) 4M
Answer:
Yes. I support Aravind’s attitude. If it is not switched off in time, there is

  1. Wastage of electrical energy.
  2. Wastage of water. We have no right to waste anything.
  3. Water is precious.
  4. We should not waste even a single drop of water.

TS 6th Class Science 11th Lesson Questions and Answers Telangana - Water in Our Life

Question 14.
If people are suffering due to severe floods, what would you do to help them ? (Application to daily life and concern to Biodiversity) 8M
Answer:
People in flood-hit areas face some immediate problems:

  1. Problem of drinking water
  2. Availability of food, fodder to cattle, etc.
  3. Shelter, in some cases
  4. Health hazards, etc.

Service rendered :

  1. I meet my friends and discuss the problem.
  2. We collect donations from generous public – money, clothes, utensils, medicines, etc.
  3. We approach some service-oriented voluntary organisations, including physicians.
  4. With their assistance, we try to help the needy in different ways.

TS 6th Class Science 11th Lesson Notes – Water in Our Life

  • Water is essential for life.
  • We need water for domestic use, agriculture, industries etc.,
  • We get water from sources such as ponds, lakes, rivers, wells etc.
  • Three-fourths of the Earth is covered with water. Most of the water is in Oceans and Seas.
  • Of the water available on the earth, only 1 % is fresh water.
  • The amount of usable water on earth is limited. So it should be used carefully.
  • We depend on rains for water.
  • Rain replenishes water in ponds, canals, wells, lakes and rivers.
  • Floods cause extensive damage to crops, domestic animals, properties and human life.
  • We must preserve water not only for us but also for further generations.
  • Water Sources : The sources from where we get water for our daily needs are called water sources. Eg: Rivers, lakes, ponds, wells etc.
  • Drought : Drought is a long period of time during which no rain falls. In drought time, it is difficult to get food and fodder.
  • Floods : The period of time during which, we experience excessive rains, is called flood.
  • Migration : People moving away from one place to another place due to natural calamities like drought or floods.

TS 6th Class Science 14th Lesson Questions and Answers Telangana – Movements in Animals

TS Board TS 6th Class Science Study Material Pdf 14th Lesson Movements in Animals Textbook Questions and Answers.

Movements in Animals- TS 6th Class Science 14th Lesson Questions and Answers Telangana

Question 1.
Imagine a situation where you have no bone in your body. Describe with reasons, what would happen ? (Asking questions and making hypothesis) 2 M
Answer:

  1. Skeleton is the typical system of our body.
  2. The bone is a part of skeletal system.
  3. If we have no bone in our body, we cannot possess specific shape.
  4. Movement of the head, trunk, legs and hands becomes impossible.
  5. Life becomes static and no activity is found.

TS 6th Class Science 14th Lesson Questions and Answers Telangana - Movements in Animals

Question 2.
Try and identify the joints in the body of a goat or a cow. Make a list of these joints. (Information Skills and projects) 2 M
Answer:

Body partType of joint
1) Neck regionPivot joint
2) ElbowHinge joint
3) ShoulderBall and socket joint

Question 3.
What difficulties would you face if your fingers had only a single bone? (Application to daily life and concern to biodiversity) 2 M
Answer:
The following typical problems will be seen due to single bone fingers in our hands.

  1. We cannot write and move the object with single-boned fingers.
  2. It will be highly difficult to eat food with hand.
  3. Fingers fail to catch or hold any object.
  4. Playing games will be difficult.

Question 4.
What is a ball and socket joint? How it is different from hinge joint? (Conceptual Understanding) 2 M
Answer:
A joint made by fitting a ball into a socket is called a ball and socket joint. Difference between a ball and socket joint and hinge joint.

  1. In a ball and socket joint, a bone can rotate easily in all directions.
  2. In hinge joint, it is not possible to rotate the bone in all directions.

Question 5.
Fill in the blanks and give reasons. (Conceptual Understanding) 2 M

  1. Joints of the bone help in the ……………… (movement of various parts of the body)
  2. The contraction of the ……………… pulls the bones during movement, (muscles)
  3. The bones at the elbow are joined by a ……………… joint. (hinge)

TS 6th Class Science 14th Lesson Questions and Answers Telangana - Movements in Animals

Question 6.
Guess who I am? (Asking questions and making hypothesis) 4 M
i) lama joint that works like joint of doors and window.
ii) I help to join two bones.
iii) Joint between upper jaw and skull.
iv) I am a chain of small – small bones.
v) I join bone and muscle.
Answer:
i) Hinge joint
ii) Ligament
iii) Fixed joint
iv) Back bone
v) Tendons

Question 7.
Collect X-Ray films and identify which body parts they represent. Write a note on them. (Information Skills and Projects) 4 M
Answer:
I collected an X-ray film of chest part of a man. I observed the following parts in the X-ray film.
TS 6th Class Science 14th Lesson Questions and Answers Telangana – Lesson Movements in Animals 1
a) Rib bones (chest bones) are seen in the film. Rib bones are like a cage.
b) There is a pair of lungs present beneath the rib cage bones.
c) Rib cage bones are arranged like a cage all around the chest and back part of the body.

Question 8.
Prepare a questionaire to take interview of a yoga teacher or PET sir about asanas and exercises. (Asking questions and making hypothesis) 4 M Questionnaire:

  1. What is the importance of yoga or asanas?
  2. Who invented this body and mind exercise?
  3. How can we get benefit from yoga?
  4. When shall we do this yoga or asanas?
  5. What would be the results of yoga/asanas?
  6. What are the food items we have to take while we follow yoga /asanas?
  7. Can we be free from diseases by following yoga/asanas regularly?
  8. Which place is more suitable for yoga /asanas?

TS 6th Class Science 14th Lesson Questions and Answers Telangana - Movements in Animals

Question 9.
Crawling snake, jumping frog, flying bird – are they amazing to you? Why do you think so? (Appreciation and Aesthetic sense and values) 4 M
Answer:

  1. We can’t crawl like a snake. Our body is not designed as such. Snake can invade into burrows easily.
  2. Frog jumps with its web feet. Its back legs are highly muscular and body is also modified for jumping and swimming.
  3. Birds can fly in the air with wings. Their bones are hollow and light.

Question 10.
List out the activities that you performed at your home before coming to school. Which joints are involved in each activity ? 8 M
(Experimentation and field investigation /Information Skills and projects.)
Answer:
The activities that I performed at my home before coming to school are given below. Some of my joints involved in each and every activity.

Activity/workPart of the body involvedJoint of the body part in the work
1) Running (Exercise)Legs and handsHinge joint, ball and socket joint
2) BrushingRight handBall and socket joint, hinge joint
3) BreakfastHandHinge joint, ball and socket joint, saddle joint
4) Dressing up and wearing shoesNeck, back bone, hands, legsAll the joints in my body
5) Doing home workFingers, handSaddle joint, hinge joint
6) Packing the bagHands, head, body, legsEvery joint involved, especially pivot joint
7) Walking to schoolLegs, hands, headAll joints involved

Question 11.
“Which joints are involved in plucking flowers, making garlands, ” Ravi’s mother asked? What is his answer?
Hinge joint, ball and socket joint, saddle joint (Application to daily life and concern to biodiversity) 2 M
Answer:

  1. When we pluck flowers, our saddle joint (at thumb), planar joint (at wrist), hinge joint (at knee) and ball and socket joints activate.
  2. Simultaneously, when we make a garland all the above mentioned joints help us.

TS 6th Class Science 14th Lesson Questions and Answers Telangana - Movements in Animals

Question 12.
What is this instrument? How do you use this? (Application to daily life and concern to biodiversity) 2 M
TS 6th Class Science 14th Lesson Questions and Answers Telangana – Lesson Movements in Animals 2
Answer:

  1. The given instrument is a metallic dumble.
  2. It is widely used in gym for strengthening of hand muscles and joints.
  3. It will be held in our hand parallel in position, the arm will be moved up and down with the help of hinge joint.

TS 6th Class Science 14th Lesson Notes – Movements in Animals

  • We feel the movement of muscle here as well.
  • Fluttering your eyelashes, chewing, breathing in and out, ifting a weight, moving your toes.
  • Different bones of different body parts combine together to form a single structure called skeleton.
    Muscles work in pairs.
  • Our backbone works like a spring.
  • The joint between upper jaw and sku ¡lis fixed joint.
  • Bones : Hard structure which keeps our body in a perfect shape.
  • Muscles : The tender fleshy structures beneath the skin are called muscles.
  • Ligament : The fibres which join the two bones together.
  • Tendon : The fibrous structures join muscles to bones.
  • Clavicle : The raised bone at shoulder blade is called clavicle.
  • Pelvic girdle : Bones on both sides of our body.
  • Hinge joint : The joints at elbow of hand and knee of the leg.
  • Locomotion : Movement of the organism.
  • Cartilage : The flexible bone of the organism.
  • Ball and socket joint : A joint made by fitting a ball into a socket.