| Term | Definition |
|---|---|
| Temperature | A measure of how hot something is. |
| Weather | What is happening in the atmosphere at a certain place and time. |
| Precipitation | What that falls from clouds to Earth's surface. |
| Atmosphere | The layer of gases that surround Earth. |
| Water Cycle | The movement of water from Earth's surface to the air and back again. |
| Oxygen | A gas in the air and water, which most living things need to survive. |
| Salt Water | Water found in oceans and seas; makes up 97% of Earth's water. |
| Evaporation | The process by which a liquid changes into a gas. |
| Fresh Water | Water that has very little salt in it. |
| Condensation | The process by which a gas changes into a liquid. |
