U2M1L1+2 Quiz

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Across
  1. 2. Giant piece of ice that create grooves in the Earth
  2. 5. Deep parts of ocean floor
  3. 7. Thickest layer of Earth
  4. 10. Earth layer hotter than the surface of the sun
  5. 12. The number of continents there are today
  6. 13. Southern supercontinent created after Pangaea split
  7. 17. Process where new crust is created and old crust is pushed away
  8. 19. Found at the top of mountain and used as evidence
  9. 20. Shows age of sea floor
  10. 21. Molten rock under the Earth's surface
  11. 22. Outermost layer of the Earth
Down
  1. 1. Man who created Continental Drift Theory
  2. 3. Earth layer made of liquid metal
  3. 4. Mountain ranges underwater
  4. 6. Theory that continents drifted apart
  5. 8. Molten rock above Earth's surface
  6. 9. Original supercontinent that included all land
  7. 11. Northern supercontinent created after Pangaea split
  8. 14. Same types found on multiple continents, used as evidence
  9. 15. Shows heights/depths of sea floor
  10. 16. Giant slabs of rock that make up the crust
  11. 18. Technology used to map sea floor