Plate tectonics

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Across
  1. 3. Pacific _____ __ ______. Zone of volcanically active mountain chains resulting from subduction on margins of Pacific Ocean.
  2. 7. Plate ___________.
  3. 9. Scientist who formalized theory of seafloor spreading.
  4. 10. Section of the Earth below the crust.
  5. 11. Seafloor __________.
  6. 13. Hawaiian Islands were formed by a stationary ___ _______.
  7. 19. Places where new seafloor is created.
  8. 20. where two plates move forward
Down
  1. 1. Largest plate.
  2. 2. The Earth's ___________ field reverses from time to time.
  3. 4. ___________ are formed via the process of collision.
  4. 5. where two plates move apart
  5. 6. where one plate slips laterally past another
  6. 8. Scientist who first proposed the theory that the continents drifted.
  7. 12. Fold in crust with an arch-like ridge.
  8. 14. Earth's supercontinent 300 million years ago.
  9. 15. ___________ continental margin does not coincide with a plate boundary.
  10. 16. Solid plastic layer of the mantle beneath the lithosphere.
  11. 17. Paleontologists noticed that these were the same on different continents even though the continents were separated by oceans.
  12. 18. ___________ zones. Places where the seafloor is forced under continental plates.