The Water Cycle
Water is always on the move. It goes around and around in a path called the water cycle.
First, the sun warms the water in seas, lakes, and puddles. Some of the water turns into a gas called water vapor. This is called evaporation. The vapor rises into the air.
High in the sky, the air is cold. The vapor cools and turns back into tiny drops of water. This is called condensation. The drops join to make a cloud.
When the drops get big and heavy, they fall as rain or snow. This is called precipitation.
The water runs into streams and rivers. Then it flows back to the sea, and the cycle starts again.