Across
- 3. rebound the sudden return of elastically deformed rock to its undeformed shape
- 8. plates Sections of the Earth's crust that move due to convection currents.
- 9. is A rigid layer made up of the uppermost part of the mantle and the crust.
- 11. boundary A plate boundary where two plates move toward each other.
- 12. reversal a switch in the direction of Earth's magnetic field so that the magnetic north pole becomes the magnetic south pole and the magnetic south pole becomes the magnetic north pole.
- 14. The edge between two or more plates classified as divergent, convergent, or transform by the movement taking place between the plates.
- 15. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
- 16. The soft layer of the mantle on which the lithosphere floats.
- 21. The strong, lower part of the mantle between the asthenosphere and the outer core
- 22. A hypothesis that has been tested with a significant amount of data
- 23. The point beneath Earth's surface where rock breaks under stress and causes an earthquake
- 24. the bending, tilting, and breaking of Earth's crust; the change in the shape of rock in response to stress
Down
- 1. drift The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
- 2. spreading The process by which molten material adds new oceanic crust to the ocean floor
- 4. A break in the earth's crust
- 5. The central part of the earth below the mantle
- 6. tectonics A theory stating that the earth's surface is broken into plates that move.
- 7. current a current caused by the rising of heated fluid and sinking of cooled fluid
- 10. The layer of hot, solid material between Earth's crust and core.
- 13. earth'soutermostlayer
- 17. Point on Earth's surface directly above an earthquake's focus
- 18. The shaking that results from the movement of rock beneath Earth's surface.
- 19. boundary A plate boundary where two plates move away from each other.
- 20. boundary A plate boundary where two plates move past each other in opposite directions