Chapter 7

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Across
  1. 2. When two plates move away from each other
  2. 4. He used sonar to find mid-ocean ridges.
  3. 7. This landmass forms when two continental plates collide
  4. 8. The name of a famous supercontinent
  5. 9. when two oceanic oceanic plates diverge.
  6. 10. When two plates move toward each other
Down
  1. 1. This contains the upper mantle and crust
  2. 3. When two plates pass each other.
  3. 5. A type of technology that was used by Harry Hess
  4. 6. He proposed the theory of continental drift