Plate Tectonics

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Across
  1. 2. The pieces of earth’s lithosphere
  2. 5. The part of the crust made of basalt
  3. 6. When subduction takes place it happens at a __________ boundary
  4. 7. One of the items in the earth that helped prove that Pangea existed
  5. 9. The idea that continents slowly move over the Earth’s surface
  6. 11. What happens at a transform boundary
  7. 14. The one continent that existed millions of years ago
  8. 16. What oceanic and continental plates create on a convergent boundary
  9. 17. Cracks in Earth’s crust after plates rub against each other
  10. 18. This boundary can form a rift valley
  11. 19. A deep valley formed by plates moving away from each other
  12. 20. The process of one plate sinking underneath another
Down
  1. 1. Type of plate boundary that destroys things
  2. 3. What Ocean floor sinks into back to the mantle
  3. 4. The part of the crust made of granite
  4. 8. The adding and widening of Earth’s oceans
  5. 10. Part of the pattern created on the ocean floor
  6. 12. A theory about seafloor spreading, Earth’s plates and the plates motion
  7. 13. The part of the ocean floor that lava comes out of
  8. 15. What two continental plates create on a convergent boundary