Across
- 6. Degenerative process leading to the reshaping of rocks
- 9. Large flat area elevated above surrounding land
- 11. A crack in the earth's surface where two pieces of land have moved in different directions
- 16. Theory that large portions of the earths crust moves causing earthquakes and volcanos
- 17. The area drained by a river system
- 19. The whole system of oceans that flow into eachother
Down
- 1. All of the water that exists on or around the earth
- 2. Portion of the earth's interior lying between the crust and the core
- 3. The area of solid matter on the surface of the earth
- 4. A river that flows into and feeds another river
- 5. Seven primary landmasses of the earth's surface
- 7. Layer of gas that surrounds the earth
- 8. Tectonic process by which the relatively thin and dense oceanic crust slowly slides down and under the more massive but less dense continental crust
- 10. A violent upheaval or change in the earth's crust
- 12. Process of heat transfer that occurs in the mantle when particles carry thermal energy as the move from one place to another
- 13. Process where glaciers recede and weep away material, creating U-shaped valleys
- 14. Natural breaking down and removal of materials on the earth's surface
- 15. Central portion of the earth that lies below the mantle
- 16. A level expanse with no visible elevation
- 18. Molten rock that flows because it is subjected to intense pressure and temperature