Earth Science

5. The process by which plants release water vapor into the atmosphere.
6. The process of liquid water turning into vapor.
9. Tectonics: The theory explaining the movement of Earth's plates.
10. Water that flows over the ground surface rather than soaking into the ground.
11. A gas in the Earth's atmosphere that absorbs most of the Sun's ultraviolet radiation.
13. The process by which water vapor turns into liquid water.
14. All the water on Earth's surface.
15. The process by which green plants make their food using sunlight.
16. The innermost layer of Earth.
17. Waves: Waves of energy caused by the sudden breaking of rock within the Earth or an explosion.
20. The rigid outer layer of Earth.

1. Cycle: The process by which carbon is exchanged among the biosphere, geosphere, hydrosphere, and atmosphere.
2. Any form of water that falls from clouds to Earth's surface.
3. Molten rock beneath the Earth's surface.
4. The regions of Earth where living organisms exist.
7. The layer of gases surrounding Earth.
8. The solid part of Earth, including rocks, minerals, and landforms.
12. The process by which rocks and soil are worn away by natural forces.
18. The thin outer layer of Earth.
19. Effect: The trapping of heat in Earth's atmosphere by greenhouse gases.