Page 65 - Carvaan Science-2

Unit 4 – Water, Air and Weather

Air
Air
Air
10 1010

Let us master about :
Let us master about :
Let us master about :
The importance of air for all living things.
All living things need air to stay alive.

Air is present all around us. All living
things need air to breathe. Air cannot be

seen or touched but it can be felt when it
moves. When you swing, run very fast you

can feel the air move against your face.

Tick ( ) the activities are polluting the air

What does air contain?

Water of seas, ponds, rivers and lakes gets warm
up due to the heat of the Sun. This water changes

into water vapour and mixes with air.
Water from wet clothes also changes into water

vapour.
Thus, air contains water vapour. Clothes drying under

the Sun.
WOW!

The air in the Earth's atmosphere is made up of approximately 78 per cent
nitrogen and 21 per cent oxygen.

65 Science-2