Water HEATS UP and becomes WATER VAPOR.
It RISES INTO the atmosphere.
What is the GASEOUS STATE of water?
When water vapor COOLS, it TURNS BACK INTO a liquid.
That process is called
After condensation, clouds BECOME heavy and water fall in WATER DROPS
After condensation, clouds BECOME heavy and water fall in SNOW FLAKES
water RUNS OFF high land and into rivers.