Minerals and Plate Tectonic Review

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Across
  1. 5. came up with the idea of continental drift
  2. 8. units used to measure plate movement in a year
  3. 10. igneous rock formed on the surface
  4. 11. changed by huge heat and pressure
  5. 14. hardest mineral
  6. 15. a pure substance with a crystal structure
  7. 17. where two plates meet
  8. 18. movement of sediments
  9. 19. layer of earth we live on
  10. 20. plates sliding past
  11. 21. the single big continent of the past
  12. 22. plates moving apart
Down
  1. 1. layer below the crust
  2. 2. plates coming together
  3. 3. break down of rock
  4. 4. weathering from ice
  5. 6. identified by layers and fossils
  6. 7. formed from cooled magma or lava
  7. 8. currents that drive plate movement
  8. 9. breaks along smooth planes
  9. 12. solid ball of iron
  10. 13. deepest one is off the coast of Japan
  11. 16. how shiney a mineral is
  12. 23. made of more than one mineral