Across
- 1. Molten rock that is pushed up from the earth's mantle.
- 5. A process by which new land is created when sea plates pull apart and magma wells up between the plates.
- 7. Wearing away of the earth's surface by wind, flowing water or glaciers.
- 9. Process of converting into vapor.
- 10. A process by which mountains can form as sea plates dive beneath continental plates.
- 11. The process of excess water vapor changing into liquid water when warm air cools.
- 13. The part of the earth where life exists.
- 15. A slow process in which a sea plate slides under a continental plate, creating debris that can cause continents to grow outward.
- 16. The removal of salt from seawater to make it usable for drinking and farming.
- 18. Surface land areas of the earth's curst, including continents and ocean basins.
- 19. Water within the earth that supplies wells and springs.
- 20. tectonics The term scientists use to describe the activities of continental drift and magma flow which create many of the earth's physical features.
Down
- 2. Underground water-bearing layers of porous rock, sand, or gravel.
- 3. A bend in layers of rock, sometimes caused by plate movement.
- 4. drift The theory that the continents were once joined and then slowly drifted apart.
- 6. Moisture that falls to the earth as rain, sleet, hail, or snow.
- 8. Fine, yellowish-brown topsoil made up of particles of silt and clay, usually carried by the wind.
- 12. Thick middle layer of the earth's interior structure consisting of dense, hot rock.
- 14. The watery areas of the earth, including oceans, lakes, rivers, and other bodies of water.
- 17. A layer of gases that surrounds the earth.