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Hi kids.
Do you know that all the water in our world goes round and
round like the tire of a bicycle .
Evaporation is the process
by which water from rivers, lakes and oceans change from liquid to a gas called
water vapour.
Condensation is the process by which a gas changes into a liquid
form.
In this case, water vapors become water droplets
again .
When the clouds become
full of water, the small water droplets join to become large drops of water
which fall down as rain.
All the water that falls
as rain on the land flows down towards the oceans.
This includes streams, rivers, waterfalls and is
called surface run off.
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