More or less, there is always the same amount of water on earth and that water is constantly moving. The water cycle describes the continuous movement of water on, above and under the surface of the earth.

The four stages of the water cycle are:

CONDENSATION

PRECIPITATION

COLLECTION

EVAPORATION



The Water Cycle.jpg

CONDENSATION

As water vapor rises in the atmosphere from evaporation, it gets cold and turns into liquid (small drops of water). Those small drops of water get together and form clouds, that are carried away by the wind.



PRECIPITATION

When the drops of water are big enough, they fall down to the Earth as rain. If it is very cold, they can fall as snow or hail.


COLLECTION

Water from the rain collects in rivers and lakes. From rives, water gets back to the seas and oceans. Some water filters through the soil and become groundwater.



EVAPORATION

The sun heats up the water from seas, oceans, rivers or lakes. Then, the water is transformed into water vapor that goes up to the the air (that is called evaporation). And the water cycle starts again.



Let´s review the 4 stages of the water cycle:





Time to watch a video to help us understand all that information






In the following video, you are going to see an experiment that proves how the water cycle works. You can try it at home if you want.





Time for recap.




This activity has been taken from www.discoveryeducation.com.


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