NCERT Exemplar solutions for Science Exemplar [English] Class 6 chapter 6 - Changes Around Us [Latest edition]

Chapters

    1: Food: Where Does It Come From?

    2: Components of Food

    3: Fibre to Fabric

    4: Sorting Materials and Groups

    5: Separation of Substances

▶ 6: Changes Around Us

    7: Getting to Know Plants

    8: Body Movement

    9: The Living Organisms and their Surroundings

    10: Motion and Measurement of Distances

    11: Light

    12: Electricity and Circuits

    13: Fun with Magnets

    14: Water

    15: Air Around Us

    16: Garbage in, Garbage out

NCERT Exemplar solutions for Science Exemplar [English] Class 6 chapter 6 - Changes Around Us - Shaalaa.com

Solutions for Chapter 6: Changes Around Us

Below listed, you can find solutions for Chapter 6 of CBSE NCERT Exemplar for Science Exemplar [English] Class 6.

Multiple Choice QuestionsVery Short Answer QuestionsShort Answer QuestionsLong Answer Questions

Multiple Choice Questions [Pages 32 - 33]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Multiple Choice Questions [Pages 32 - 33]

1.Page 32

Pick the change that can be reversed from the following.

Cutting of trees
Melting of ghee
Burning of candle
Blooming of flower

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2.Page 32

Which of the following change cannot be reversed?

Hardening of cement
Freezing of ice cream
Opening a door
Melting of chocolate

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3.Page 32

An iron ring is heated. Which of the following statement about it is incorrect?

The ring expands.
The ring almost comes to the same size on cooling.
The change in this case is reversed.
The ring changes its shape and the change cannot be reversed.

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4.Page 32

While lighting a candle, Paheli observed the following changes.

Wax was melting
Candle was burning
Size of the candle was reducing
Melted wax was getting solidified.

Of the above, the changes that can be reversed are

(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)

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5.Page 33

Salt can be separated from its solution (salt dissolved in water), because ______.

mixing of salt in water is a change that can be reversed by heating and melting of salt.
mixing of salt in water is a change that cannot be reversed.
mixing of salt in water is a permanent change.
mixing of salt in water is a change that can be reversed by evaporation.

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6.Page 33

Rolling of chapati and baking of chapati are the changes that ______.

can be reversed.
cannot be reversed.
can be reversed and cannot be reversed, respectively.
cannot be reversed and can be reversed, respectively.

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7.Page 33

Iron rim is made slightly smaller than the wooden wheel. The rim is usually heated before fixing into the wooden wheel, because on heating the iron rim ______.

expands and fits onto the wooden wheel.
contracts and fits onto the wooden wheel.
no change in the size takes place.
expands first, then on cooling contracts and fits onto the wooden wheel.

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Very Short Answer Questions [Page 34]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Very Short Answer Questions [Page 34]

8.Page 34

Look at the figure which shows three situations.

Which of these shows a reversible change and why?

A burning candle
An extinguished candle
Melting wax

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9.Page 34

A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?

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10.Page 34

Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?

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Short Answer Questions [Pages 34 - 35]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Short Answer Questions [Pages 34 - 35]

11. (a)Page 34

Can we reverse the following change? If yes, suggest the name of the method.

Water into water vapour

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11. (b)Page 34

Can we reverse the following change? If yes, suggest the name of the method.

Water vapour into water

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11. (c)Page 34

Can we reverse the following change? If yes, suggest the name of the method.

Ice into water

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11. (d)Page 34

Can we reverse the following change? If yes, suggest the name of the method.

Curd into milk

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12.Page 35

Which of the following changes cannot be reversed?

Blowing of a balloon
Folding paper to make a toy aeroplane
Rolling a ball of dough to make roti
Baking cake in an oven
Drying a wet cloth
Making biogas from cow dung
Burning of a candle

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13.Page 35

Boojho’s sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? Justify your answer.

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14.Page 35

Tearing of paper is said to be a change that cannot be reversed. What about paper recycling?

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Long Answer Questions [Pages 35 - 36]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Long Answer Questions [Pages 35 - 36]

15. (a)Page 35

Give one example of change which occurs on heating but can be reversed.

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15. (b)Page 35

Give one example of change which occurs on heating but cannot be reversed.

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15. (c)Page 35

Give one example of change which occurs on cooling but can be reversed.

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15. (d)Page 35

Give one example of change occurs on mixing two substances, but can be reversed.

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15. (e)Page 35

Give one example of change which occurs on mixing two substances, but cannot be reversed.

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16.Page 36

A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer.

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17.Page 36

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

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18.Page 36

Change of a bud into a flower is a change which cannot be reversed. Give four more such example.

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19.Page 36

Paheli mixed flour and water and

made a dough,
rolled the dough to make a chapati,
baked the chapati on a pan,
dried the chapati and ground it in a grinder to make powder.

Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.

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20.Page 36

lt was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli’s home:

Simba blew balloons and put them on the wall.
Some of the balloons got burst.
Paheli cut colourful strips of paper and put them on the wall with the help of tape.
She also made some flowers by origami (paper folding) to decorate the house.
Her father made dough balls.
Mother rolled the dough balls to make puries.
Mother heated oil in a pan.
Father fried the puries in hot oil.

Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed.

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Solutions for 6: Changes Around Us

Multiple Choice QuestionsVery Short Answer QuestionsShort Answer QuestionsLong Answer Questions

NCERT Exemplar solutions for Science Exemplar [English] Class 6 chapter 6 - Changes Around Us

Shaalaa.com has the CBSE Mathematics Science Exemplar [English] Class 6 CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT Exemplar solutions for Mathematics Science Exemplar [English] Class 6 CBSE 6 (Changes Around Us) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.

Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT Exemplar textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.

Concepts covered in Science Exemplar [English] Class 6 chapter 6 Changes Around Us are Changes-Physical and Chemical, Classification of Change: Reversible and Irreversible Changes, Classification of Change: Desirable and Undesirable Changes, Classification of Change: Natural and Man-made Changes, Classification of Change: Periodic and Non-periodic Changes, Classification of Change: Slow and Fast Changes, Classification of Change: Physical Changes, Chemical Reaction, Effect of Heat on Solid, Liquid and Gases.

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NCERT Exemplar solutions for Science Exemplar [English] Class 6 chapter 6 - Changes Around Us [Latest edition]

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Chapters

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Solutions for Chapter 6: Changes Around Us

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Multiple Choice Questions [Pages 32 - 33]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Very Short Answer Questions [Page 34]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Short Answer Questions [Pages 34 - 35]

NCERT Exemplar solutions for Science Exemplar [English] Class 6 6 Changes Around Us Long Answer Questions [Pages 35 - 36]

Solutions for 6: Changes Around Us

NCERT Exemplar solutions for Science Exemplar [English] Class 6 chapter 6 - Changes Around Us

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