Plate Techtonics Crossword puzzle

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Across
  1. 3. the layer beneath the crust
  2. 5. a large section of the crust
  3. 9. the outermost layer of Earth
  4. 10. when one plate moves under another
  5. 13. pertaining to earthquakes
  6. 15. a mountain that erupts
  7. 16. a deep dip formed by subduction
  8. 17. a shaking caused by plate movement
  9. 18. a split where plates move apart
  10. 19. a ridge where new crust forms
  11. 20. plates sliding past each other
Down
  1. 1. when plates move apart
  2. 2. relating to land plates
  3. 4. the rigid outer layer
  4. 6. related to Earth's plate movements
  5. 7. the semi-fluid layer below
  6. 8. a place of intense volcanic activity
  7. 11. molten rock beneath the surface
  8. 12. when plates come together
  9. 14. a crack where earthquakes occur