plate crossword

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Across
  1. 4. a pieces that are broken by cracks
  2. 5. when one plate goes back to the earth crust.
  3. 7. pieces of earth crust diverge
  4. 8. the upper layer of the oceanic portion
  5. 10. when plates move away
  6. 11. when sea floor is moving apart
  7. 13. boundary when two plates collide
  8. 15. a mountain with lava
  9. 16. when the ocean floor plunges into deep underwater canyons
  10. 17. a scientist
  11. 19. breaks into earth's crust when rock slip past each other
Down
  1. 1. the thinnest part of the earth
  2. 2. a bone that got turned to rock
  3. 3. seams that ran along a mountain
  4. 4. supercontinent
  5. 6. drew map showing features of the ocean floor
  6. 9. when plates slide past each other
  7. 12. a theory why plate move
  8. 14. the biggest layer of the earth
  9. 18. device using sound wave