What kind of water covers most of Earth´s surface?​ (a)   ​

What do humans use fresh water for?​ (a)   ​ (b)   ​ (c)   ​ (d)  

Water can be ​ (a)   , ​ (b)   or a gas. Its form depends on its ​ (c)   . Most water on Earth is​ (d)   . You can see liquid water in rivers, ​ (e)   and oceans. It also falls as rain.

Water can also exist as a gas. The gas is _______ _________. It is all around you. but you can´t see it.

(a)  

Water changes all the time. When you heat liquid , it can (a)   . Evaporation is the change from a liquid to a ​ (b)   . When you cool the gas, it can ​ (c)   . Condensation is the change from a gas to a ​ (d)   .

All living things use water to stay alive. People use it everyday but it never runs out. Why? Because Earth ​ (a)   its water

in the (b)   . Its the movement of water from Earth´s surface to the ​ (c)   and back again.

Water vapor is water that has ​ (a)   . Evaporation requires ​ (b)   .The sun´s ​ (c)   is the source of this heat. As the water vapor rises, it ​ (d)   . Condensation turns the water vapor from a gas into tiny drops of ​ (e)   . If the air is cold enough, the water vapor turns into tiny crystals of ice and then form clouds.

When the droplets of water or crystals get large enough, they fall to the ground as ​ (a)   or ​ (b)   . This is called ​ (c)   .