Page 109 - ICSE Science 3 : E-book

3. Matter that has no taste, smell or colour ____________
4. The continuous movement of water between the sky

and the earth ____________

5. Method for increasing the groundwater levels ____________

D. Match the following.

Column A Column B

1. Evaporation (a) Water vapour changes into water

2. Freezing (b) Ice changes into water
3. Condensation (c) Water changes into water vapour

4. Melting (d) Water changes into ice

E. Answer the following questions.

1. Which process takes place when water changes into water vapour on
heating?

2. What is water cycle? Explain it with the help of a diagram.

3. What are impurities? What are its two types?
4. Why should not we drink impure water? How can it be purifi ed?

5. Why is rainwater harvesting important?

THINK AND ANSWER

1. What do you think will happen if water is not conserved?

2. We use a machine at home that contains candles in it to remove harmful
impurities from water. What is it?

TALK ABOUT

Discuss why there is a need to purify water? Why can’t we use it directly? Also, discuss
various ways of purifying water at home.

LINK AND LEARN

Water from clouds fall down in the form of rain. Make a small report on rainy season of India
and explain why rain is important to us.

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