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bigger. It gives a shape to the balloon. Now, remove your hand from the
mouth of the balloon. What do you observe? The air will come out of the
balloon and you will hear a whistle sound.

Try Your Bits

Think of some more things in
which you can fill air like empty
bottle etc.

Hence, we can say that air takes up space.

Air has Weight

Take two footballs. One should be filled with air
and the other should be not filled with air. Now
hold both of them to find out which is heavier.
What do you observe? You will notice that the
football filled with air is heavier. Hence, we can say
that air has weight.

Uses of Air

We need air for various purposes . Lets read about them.

TFaimcte Fish breathe air through
gills. Plants breathe air

through the pores in the

leaves.

All living things need air to breathe.

We need air to We need air to
fill the tyres. burn fire.

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