Plate Tectonics

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Across
  1. 4. idea that the continents were once one landmass that moved apart over time
  2. 9. upper layer of Earth's mantle
  3. 12. often forms at subduction zones
  4. 14. large moveable sections of the lithosphere
  5. 15. underwater volcano that pushes plates apart
  6. 16. boundary formed when two plates collide together
Down
  1. 1. when one tectonic plate slides under another
  2. 2. boundary formed when two tectonic plates move away from each other
  3. 3. outermost rigid layer of Earth
  4. 5. sudden and violent shaking of the ground resulting from movements of earth's crust
  5. 6. leads to the creation of new ocean floor
  6. 7. one form of evidence that tectonic plates have moved over time
  7. 8. where old ocean floor is destroyed
  8. 10. boundary formed where two plates slide sideways past each other
  9. 11. located between the core and the crust of the earth
  10. 13. an ancient supercontinent that eventually split