Introduction to Plate Tectonics

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Across
  1. 5. ___________ crust is thicker
  2. 6. the first super =continent
  3. 9. the upper part of the mantle that the crust sits on top of
  4. 10. contains the semi-solid layer of the Earth
  5. 14. a person who studies geology
  6. 16. the theory that the Earth is made of moving plates
  7. 19. this scientist that gave evidence for the mid-atlantic ridge
  8. 21. ____________ currents move tectonic plates
  9. 22. molten rock found above the crust
  10. 23. ________ waves are used to take measurements inside the Earth
Down
  1. 1. the supercontinent making the countries in the northern hemisphere
  2. 2. the scientist who first proposed continental drift
  3. 3. the theory that the continents have moved over time
  4. 4. the supercontinent made of Gondwana and Laurasia
  5. 7. the branch of science studying the Earth
  6. 8. ___________ spreading is responsible for forming ocean ridges
  7. 11. molten rock found below the crust
  8. 12. the centre of the Earth
  9. 13. the supercontinent making the countries in the southern hemisphere
  10. 15. the mid-_________ ridge runs along the west coast of America
  11. 17. the solid, outer layer of the Earth
  12. 18. continental _________ are underwater cliffs
  13. 20. _________ crust is thinner