Earths Crust

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Across
  1. 2. semi-melted rock
  2. 4. Ring of
  3. 6. theory that earths crust is made up of plates
  4. 7. a long period of time
  5. 8. when plates move away from each other
  6. 11. a devise that measures earthquakes
  7. 13. crack in the earths crust
  8. 14. someone who studies what makes up the Earth
  9. 15. mountain made from lava
  10. 18. vibrations in the earths crust
Down
  1. 1. point of surface where earthquake starts
  2. 3. large hill made from convergent boundary
  3. 4. where an earthquake starts
  4. 5. when plates collide with each other
  5. 7. shaking of the earths crust
  6. 9. when plates slide past each other
  7. 10. earths crust above the ocean
  8. 12. when one plate moves under another plate
  9. 16. earths crust under the ocean
  10. 17. ripples that an earthquake sends out