Plate Tectonics

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Across
  1. 6. the denser plate sinks under the buoyant one
  2. 10. as a slab sinks, it pulls the plate with a force called :
  3. 12. the circulation of material due to density
  4. 13. two plates collide
  5. 14. Rising mantle at mid-ocean creating potential for plates to move away
  6. 15. Reverses to point south
Down
  1. 1. two plates sliding past each other
  2. 2. Mountains ranges in the ocean
  3. 3. Earth's surface is thought to be made of these
  4. 4. New crust forms Old crust moves
  5. 5. two plates separating
  6. 7. magnetic field reverses direction
  7. 8. continents in constant motion
  8. 9. needle pointing north
  9. 11. The rigid, cold, outermost layer of rock
  10. 16. the supercontinent