tyler's plate tectonics

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Across
  1. 3. a break in earth's crust along which rocks move.
  2. 7. is a structure that forms in earth's crust when molten on land or on the ocean floor.
  3. 8. a giant wave usually caused by an earthquake beneath the ocean floor.
  4. 11. liquid magma that reaches the surface
  5. 13. an undersea valley that represents one of the deepest parts of the ocean.
  6. 15. force that acts on rock to change its shape or volume.
  7. 16. the measurement of an earthquake's strength
  8. 17. the shaking that results from the movement of rock beneath earth's surface.
  9. 18. a plate boundary where tow plates move past each other in opposite directions.
  10. 19. an undersea mountain chain where the new ocean floor is produced is a divergent plate boundary under the ocean.
Down
  1. 1. an area where magma from deep within the mantle melts through the crust above it.
  2. 2. a plate boundary where tow plates move away from each other.
  3. 4. a plate boundary where tow plates move toward each other.
  4. 5. stress they stretch rock so that it becomes thinner in the middle.
  5. 6. stress that squeezes rock until it folds or breaks.
  6. 9. the process with oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary.
  7. 10. is a molten mixture of rock forming substances,gases,and water from the mantle.
  8. 12. stress that pushes masses of rock in opposite directions in sideways movement.
  9. 14. term used to describe a volcano that is no longer active and unlikely to erupt again.
  10. 15. the process with molten material adds new oceanic crust to the ocean floor.