Plate Tectonics

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Across
  1. 1. The outer rigid layer of the earth.
  2. 5. Feature that forms at Convergent Boundaries
  3. 8. A crack in earths lithosphere.
  4. 10. The Pacific ocean is getting _______.
  5. 12. ___________ drift is the theory that the plates are in constant movement
  6. 13. Plate boundary that moved together
  7. 14. __________ currents occur in the mantle and drive plate movement.
  8. 16. The fault line in Missouri
  9. 18. Plate Boundary that moves in different directions past eachother
  10. 19. Fault where plates slide past another
Down
  1. 2. Fault where plates move together
  2. 3. Fault where plates squeeze together
  3. 4. Valley that forms at divergent boundaries
  4. 6. A supercontinent that once incorporated almost all the landmasses on Earth.
  5. 7. A large segment of earth's crust that moves
  6. 9. Where old ocean floor gets destroyed.
  7. 11. the upper layer of the earths' mantle
  8. 15. The Atlantic ocean is getting ______.
  9. 17. Plate boundary that spreads apart