Across
- 2. a flat area that rises above the surrounding land
- 5. a complete trip of Earth around the sun
- 7. a giant wave caused by Earth moving under the ocean floor
- 9. the change of liquid water to water vapor
- 10. process that makes salt water safe to drink
- 12. the subsystem that consists of Earth's water
- 13. the name we call the beginning of summer or winter
Down
- 1. the process by which Earth's surface is worn away by natural forces
- 3. the layer of gases that surrounds Earth
- 4. this causes night and day to occur on Earth
- 6. a place where two tectonic plates grind against each other
- 8. a long, steep cut on the ocean floor
- 11. a narrow strip of land that connects two larger land areas