How Clouds Form It takes a lot of water to form a cloud.


2 Water vapor rises into the air, cools, and condenses


into tiny droplets of water.


1 Energy from the sun causes water to


evaporate and form water vapor.


5 Over time, the water fl ows back into rivers, lakes, and the ocean.


M MARCH 2015 19 ARCH 2015 19


Dark clouds churn as a thunderstorm forms.


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