Plate Tectonics

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Across
  1. 3. the mid-atlantic ridge is an example of this
  2. 4. when lava erupts out of a mountain
  3. 8. when one plate goes underneath another
  4. 9. these happen at transform boundaries and strike-slip faults
  5. 10. the plates float on the top of this
  6. 11. the igneous rock that oceanic crust is made of
  7. 14. where two tectonic plates meet
  8. 17. when two tectonic plates move apart
  9. 18. drift the theory that the continents move
Down
  1. 1. where mid-ocean ridges form, also Harry Hess' theory
  2. 2. the driving force of plate tectonics
  3. 5. when two plates collide and the land is forced up
  4. 6. the igneous rock that continental crust is made of
  5. 7. the top layer of the mantle where the plates float
  6. 12. when two plates slide past each other
  7. 13. when you plates collide into each other
  8. 15. currents that are in the mantle and the driving force of plate tectonics
  9. 16. this is formed when two continental plates diverge