Plate tectonics unit crossword puzzle

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Across
  1. 2. the process that drives plate tectonics
  2. 7. _____ slip faults
  3. 9. the most recent super continent
  4. 11. earth's ______ has two layers
  5. 12. at _____ boundaries plates move apart
  6. 15. the Alfred ______ invented continental drift
  7. 16. the _______ ocean is shrinking
  8. 17. where two plates crash into each other
  9. 19. what can form at convergent boundaries
Down
  1. 1. the Pacific ocean is _________
  2. 3. where oceanic plate is pulled down to mantel
  3. 4. the ______ ocean is growing
  4. 5. the opposite of a normal fault
  5. 6. the mid Atlantic ridge is _______
  6. 8. ______ spreading happens at mid ocean ridges
  7. 10. the ring of ____ is around the pacific plate
  8. 13. earth is made up of _________
  9. 14. plate _________ are a big factor in geology
  10. 18. old crust is being destroyed in _________
  11. 20. _______ faults happen when rocks pull apart