Across
- 1. Something that happens over and over again
- 6. When water collects in oceans and rivers, or underground
- 9. The process of water vapor cooling and changing to liquid water
- 10. Water gas in the air
- 12. The process by which plants release water vapor into the air
- 13. The layer of air or other gases around Earth
Down
- 2. The process in which a liquid changes to a gas
- 3. A climate zone between tropical and polar climate zones
- 4. Water that is found under the ground
- 5. Rainwater that does not soak into the ground
- 7. A climate zone that is always warm
- 8. A climate zone that is cold all the time
- 11. A body of rocks or sediment that holds groundwater
- 14. Water that falls on the surface on Earth as rain, snow, or hail