Across
- 4. boundary A plate boundary where two plates move away from each other.
- 6. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
- 8. ridge An underwater moutain chain where new ocean floor is formed
- 11. Greatness of size, strength, or importance
- 12. Magma that reaches Earth's surface
- 13. The shaking that results from the movement of rock beneath Earth's surface.
Down
- 1. boundary A plate boundary where two plates move toward each other.
- 2. boundary A plate boundary where two plates move past each other in opposite directions
- 3. spreading The process by which molten material adds new oceanic crust to the ocean floor
- 5. A giant wave usually caused by an earthquake beneath the ocean floor.
- 7. A break in the earth's crust
- 8. Molten rock beneath the earth's surface
- 9. volcano A volcano that has not erupted for a long time, but may erupt again one day.
- 10. trench Deep valley in the ocean floor that forms along a subduction zone
- 14. spot An area where magma from deep within the mantle melts through the crust above it