Plate Tectonic

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Across
  1. 4. A break in the Earth's crust
  2. 7. The supercontinent included almost all landmasses on earth in early geologic time
  3. 8. New lithosphere is created
  4. 10. The main landmasses on Earth
  5. 13. Person who proposed the theory of continental drift
  6. 15. When tectonic plates push away from each other
  7. 16. A tool used to measure earthquakes
  8. 17. a process that causes the plates to move
  9. 18. The theory that the Earth's continents have moved over time
Down
  1. 1. A natural occurrence caused by the moving of tectonic plates
  2. 2. Caused by plates colliding with each other
  3. 3. The area where subduction occurs
  4. 5. The center of an earthquake
  5. 6. Caused by transform boundaries sliding past each other
  6. 9. A bend in a rock due to stress
  7. 11. When tectonic plates slide past each other
  8. 12. A valley that forms at the edge of a continent
  9. 14. When tectonic plates collide with each other
  10. 17. Outermost layer of the Earth