Each year on March 22 we mark World Water Day.
The earth has a limited amount of water. That water keeps going around and around - well, you get the idea - in what we call the "Water Cycle".
This cycle is made up of a few main parts:
- evaporation (and transpiration)
- condensation
- precipitation
- collection
The Water Cycle - with Smartphone Avatar character |
Heat from the Sun causes water on Earth (in oceans, lakes etc) to evaporate (turn from liquid into gas) and rise into the sky. This water vapor collects in the sky in the form of clouds.
Condensation:
As water vapor in the clouds cools down it becomes water again, this process is called condensation.
Precipitation:
Water falls from the sky in the form of rain, snow, hail, or sleet, this process is called precipitation.
Collection:
Oceans and lakes collect water that has fallen. Water evaporates into the sky again and the cycle continues.
http://www.kidzone.ws/water/
http://www.kidzone.ws/water/
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