Page 176 - New Medley 3 Semester 2

REMEMBER THESE TERMS

Water vapour : Water in the form of a gas
Evaporation : Change of liquid water into water vapour on heating
Condensation : Change of water vapour into water on cooling

Conservation : To use something carefully
Freezing : Change of water into ice

Check Your Study
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A. Tick () the correct answers.

1. e layer of air around the Earth is called the
(a) atmosphere (b) wind

(c) storm (d) breeze

2. When green plants make food, they give out a gas called

(a) carbon dioxide (b) nitrogen

(c) water vapour (d) oxygen

B. Write True or False.
1. Air is blue in colour.

2. All animals breathe in air.

3. Living things do not need water.

4. e solid form of water is called the ice.

C. Fill in the blanks with the words given in the box.

water vapour evaporate water solid

1. Humans cannot live without

2. Snow is an example of water.

3. Water evaporates to turn into

4. e heat of the sun causes water to from the rivers.

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