Plate Tectonics and Pangaea

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Across
  1. 3. sudden shaking of earth
  2. 5. supercontinent long time ago
  3. 7. large section of hard solid rock
  4. 8. soft solid rock under outer layer
Down
  1. 1. two plates move away from each other
  2. 2. another word for outer layer
  3. 4. two plates slide past each other
  4. 6. plates move towards each other one subducts