Plate tectonics

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Across
  1. 4. The person who invented the theory of plate tectonics
  2. 5. The planet we live on
  3. 7. When two plates move together
Down
  1. 1. There are 12 on earth
  2. 2. The name of the puzzle
  3. 3. when two plates are moving apart from each other
  4. 6. these happen often at a divergent boundary when the mantle is coming up between two plates