Across
- 1. giant waves caused by earthquakes or volcanic eruptions under the sea
- 2. a series of processes that create and transform the types of rocks in Earth's crust
- 5. to build up
- 8. a collision between two of Earth's tectonic plates, where one plate sinks into the mantle underneath the other plate
- 12. long, narrow depressions on the seafloor
- 13. a boundary where two plates are moving away from each other and new crust is forming
- 15. process that occurs at divergent plate boundaries, leading to the creation of new ocean floor
- 17. inner most layer of the Earth and helps generate the Earth's magnetic field
- 18. are gigantic pieces of the Earth's crust and uppermost mantle
- 19. the movement of continents resulting from the motion of tectonic plates
Down
- 1. sediment is moved from one place to another
- 3. the rate an area is worn down over time
- 4. when water, ice, acids, salts, plants, animals, and/or temperature changes break down or dissolve rocks and minerals
- 6. the youngest layer is at the top, the oldest layer is at the bottom
- 7. to cause damage or to destroy
- 9. a seafloor mountain system formed by plate tectonics
- 10. third layer of the Earth; only liquid layer; mainly made up of the metals iron and nickel
- 11. crack in the Earth's lithosphere that occurs between two pieces of rock
- 14. how much an area of land is pushed up over time
- 16. geologic structure that is formed by layers or beds of rock being bent or folded.