tectonic plates

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Across
  1. 3. old rocks from millions of years ago
  2. 5. a mountain that spouse lava from the top
  3. 7. the ocean's crust bends down
  4. 11. 2 layer of the earth
  5. 12. plates that pass each other
  6. 14. two sub layers of earth's crust that move around and makes volcanos,mountains,etc…
  7. 15. first layer of earth
  8. 19. a huge section of earth’s crust
Down
  1. 1. plates that collide with each other
  2. 2. plates that move away from each other
  3. 4. a system that lets you detect things underwater
  4. 6. large gap in earth surface along a fault line
  5. 8. continents that slowly move across the earth's surface
  6. 9. a crack in the crust where rock pass each other
  7. 10. a sudden shake in the ground causing a lot of damage
  8. 11. mountains that come up from the ocean floor
  9. 13. seafloor that sinks under a deep-ocean trench back in the mantle
  10. 16. a large steep hill that is formed from plates
  11. 17. a german scientist who discovered that the continents moved
  12. 18. a supercontinent millions of years ago