water is always found in surface water (oceans, rivers, lakes that are reseirvoirs in the water cycle). all this water on the earth is called the hydrosphere.
it evaporates (turns from liquid to vapor) EVAPORATION. the sun causes water to evaporate.
after it forms and can't hold any more vapor, it can rain, snow, sleet, or hail in the form of PRECIPITATION. water returns to the earth through precipation.
this is the water cycle and it's iportant because every living thing depends on clean water.
sometimes water flows across the top of the earth. this is called runoff, and it adds to the amount of water in , streams, and lakes.
or water can get soaked in the ground (infiltration). the water is called groundwater.
it supplies water for us, farming, and other things.
the water cycle's been circulating the same supply of water for a long time.
even though the water in each cycle is always moving, the amount in a cycle never changes. it keeps on moving, so it doesn't lose anything.
