Page 187 - New Medley 2_Semester 2
P. 187
Air is necessary for fire to burn
Take a candle and a beaker. Light the candle with the help of
your teacher and cover it with a beaker. What happens?
The candle goes off after some time. This is because the
burning candle uses all the air inside the beaker. It proves that
air is necessary to burn fire.
When dust and smoke mix with the air,
it becomes dirty. Dirty air is harmful to
us and other living things. It can make
us sick.
The smoke from vehicles and factories
makes air dirty.
Plants help to keep the air fresh. So, we Smoke from cars and
should grow more and more plants. factories makes the air dirty.
Remember
We cannot live without air.
Air takes up space.
Air has weight.
Air is necessary to burn fire.
Dirty air is harmful to us.
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