MEDIUM
6th CBSE
IMPORTANT
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Freezing of water into ice is an irreversible change.

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Important Questions on Changes Around Us

EASY
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q III
The solubility of a solid substance decreases with the rise in temperature.
MEDIUM
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q III
Pressure or force can bring about reversible as well as non-reversible changes.
EASY
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q III
A solution which can dissolve more of a substance is a saturated solution.
EASY
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q III
Tearing of paper is a reversible change.
HARD
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q IV

Match the statements in column A with those in column B.

     Column A   Column B
1 Disappearance of a substance in a liquid a expansion
2 A liquid changing to solid state   b condensation
3 A vapour changing to liquid state   c freezing
4 A change which is permanent in nature d dissolution
5 A change which is temporary in nature e irreversible
6 Increase in the volume of substances on heating  f reversible

 

EASY
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q V
A sharpener loses its sharpening power, if used continuously. Is the loss of sharpening power a reversible change or an irreversible change?
EASY
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q V
Is ironing of clothes an irreversible change? Give a reason for your answer.
EASY
6th CBSE
IMPORTANT
Learning Elementary SCIENCE A Book of Science & Technology FOR Class 6>Chapter 6 - Changes Around Us>EXERCISES>Q V
Is converting wood into sawdust a reversible change? Give one reason for your answer.