Introduction to Plate Tectonics

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