Plate Tectonics Crossword

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Across
  1. 2. Plates that collide
  2. 3. Plates that slide past each other
  3. 5. Harry Hess proposed the theory of
  4. 7. Proposed the theory of continental drift
  5. 10. Plates that spread apart
Down
  1. 1. Upper layer of Earth's crust, below lithosphere
  2. 4. Under water mountain range
  3. 6. Name of continents when they were one piece
  4. 8. Found on rocks in different continents
  5. 9. Different continents fit together like this