Plate Tectonics

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Across
  1. 3. proposed the theory of plate tectonics
  2. 8. boundary where plates slide past each other
  3. 9. these cause earthquakes
  4. 12. the layer that s-waves stop at
  5. 13. when oceanic plate plunges underneath continental crust
  6. 14. Earth's supercontinent
  7. 16. boundary where plates move apart
  8. 18. pipes of hot rock that rise through mantle
  9. 19. movement of the plates over earth's surface
Down
  1. 1. the outermost mechanical layer
  2. 2. caused by convection currents in the mantle
  3. 4. the first supercontinent
  4. 5. the layer that makes up 68% of earth's mass
  5. 6. the layer that makes up less than 1% of Earth's mass
  6. 7. heat is transferred through rapid collisions of atoms
  7. 10. Activity that occurs within a plate
  8. 11. Waves that cannot travel through liquid
  9. 13. worlds most notorious transform fault
  10. 15. boundary where plates collide
  11. 17. Fastest waves that move at 4 miles per second