Plate tectonic

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Across
  1. 3. The man who came up with the continental drift theory.
  2. 4. The crust that the continents are on.
  3. 7. Vibrations that travel through earth.
  4. 9. Crack in Earths crust where plates move.
  5. 10. Gigantic ocean
  6. 13. Areas covered by ocean water.
  7. 14. Where convection currents are.
  8. 15. A super continent.
  9. 17. where two plates are moving in opposite directions as in a mid ocean ridge.
  10. 20. The rigid rocky outer layer of earth.
Down
  1. 1. Molten rock deep inside the earth.
  2. 2. Solid and really heated metal.
  3. 5. The point where the boundaries of three tectonic plates meet.
  4. 6. When one plate moves under another.
  5. 8. How seafloor is made and destroyed.
  6. 11. A deep gash in the seafloor.
  7. 12. Hot molten.
  8. 16. The movement of material due to differences in temperature.
  9. 18. Large sheets of slow moving ice.
  10. 19. The shaking of earths ground.