The water cycle
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Water is very very important to all of us
As all living things depend on a clean supply of water
As we know water covers more than 70% of Earth´s surface
The heat energy from the Sun causes some of the water to evaporate from the surface of oceans, lakes and rivers and from plants as well
When water evaporates it changes from liquid to gas
This water vapor rises and cools and then condenses back into water to form clouds
When water molecules in clouds collect into big enough drops, they fall as rain or snow depending on the temperature
This runs into rivers and lakes and can sometimes soak into underground layers of rock
Eventually the water returns to the oceans to complete the cycle
Let´s see the water cycle
First we see the rain on the left and on the right we see the formation of clouds by the process of evaporation
This process of constant cycling of water from land to air and back again is called water cycle, it´s been going on for billions of years