Across
- 2. Earth's outermost layer
- 3. current a current caused by the rising of heated fluid and sinking of cooled fluid
- 4. Ridge divergent boundary in the middle of the Atlantic Ocean
- 5. plate boundary forms where two plates slide past each other
- 7. the shaking that results from the movement of rock beneath Earth's surface
- 9. crust a solid, thin outermost layer of Earth
- 12. the layer of hot, solid material between Earth's crust and core
- 14. spreading the process that creates new sea floor as plates move away from each other at the mid-ocean ridges
- 17. plate boundary where two plates are moving apart, magma comes up to create new crust
- 18. spot a volcanically active area of Earth's surface far from a tectonic plate boundary
- 19. the supercontinent containing all of Earth's land that existed about 225 million years ago
- 22. plate boundary an area where plates move toward one another and collide
- 23. crust thinner, more dense, younger crust making ocean floor
- 24. core a dense sphere of solid iron and nickel at the center of Earth
Down
- 1. one plate going under another plate
- 2. drift the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
- 6. plates large movable plates under the Earth's surface.
- 8. the solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle
- 10. core a layer of molten iron and nickel that surrounds the inner core of Earth
- 11. a weak spot in the crust where magma has come to the surface
- 13. a crack in the earth's crust
- 15. valley a valley formed by the separation of tectonic plates
- 16. extremely deep areas in the ocean that are created by a subducting plate
- 20. the soft layer of the mantle on which the lithosphere floats
- 21. a landform with high elevation and high relief and formed by movement of the tectonic plates in the Earth's crust