Plate Tectonics

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Across
  1. 2. layer of earth below the mantle
  2. 5. layer that sits on top of lithosphere
  3. 8. boundary where plates slide past each other
  4. 9. instrument used to map the ocean floor
  5. 10. proposed the theory of continental drift
  6. 11. layer of the earth below the crust
  7. 13. outermost layer of the earth
  8. 16. occurs when oceanic crust slides under continental crust
  9. 17. occurs at mid-ocean ridges
  10. 18. boundary where plates collide
Down
  1. 1. less dense and thicker crust type
  2. 3. innermost layer of the earth
  3. 4. occurs in mantle and causes plate movement
  4. 6. supercontinent
  5. 7. number of main layers of the earth
  6. 12. layer made of crust and upper mantle
  7. 14. boundary where plates move away from each other
  8. 15. more dense crust type