plate tectonic crossword

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Across
  1. 1. process by which molten material adds new oceanic crust to the ocean floor
  2. 3. boundary were two plates move away from earth other
  3. 4. area were magma from deep within the mantle melts
  4. 7. under sea valley that represents one of the deepest parts of the ocean
  5. 9. measurement of an earthquake's strength
  6. 11. process by which oceanic crust sinks beneath a deep ocean trench
  7. 14. a break in Earth's crust along which rocks move
  8. 16. giant wave
  9. 18. boundary where two plates move past each other
  10. 19. hot solid material between earth's crust and core
Down
  1. 1. stress that pushes masses of rock in opposite directions
  2. 2. term used to describe a volcano that is likely not going to erupt again
  3. 5. boundary were two plates move toward each other
  4. 6. vibrations that travel through earth
  5. 8. shaking from the movement of rock beneath earth
  6. 10. molten mixture
  7. 12. term used to describe a volcano that is currently no active
  8. 13. stress that stretches rock
  9. 15. liquid magma that reaches the surface
  10. 17. layer of rock that forms Earth's outer surface