| A | B |
|---|
| water vapor | an invisible gas |
| evaporation | as the sun warms the liquid water heats up and changes into a gas |
| condensation | when water vapor cools, it turns back into tiny drops of liquid water. |
| precipitation | rain, snow, sleet, hail |
| precipitation | water drops in clouds that are too big and heavy, then falls to the Earth. |
| rain | liquid water |
| snow | water drops freezing into ice crystals. |
| sleet | snow and rain mix together as they fall. |
| hail | larer pieces of ice. |
| water sources | rivers, lakes, reservoirs, and wells. |
| ground water | water found underground |
| well | a deep hole that may go hundreds of feet underground with water in it. |
| reservior | formed by building a dam across a river or stream to block the flow of water. |
| surface water | water that ends up in rivers and lakes. |
| conservation | to use natural resources wisely. |
| Sun | the energy source that drives the water cycle. |
