tectonic plates

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Across
  1. 4. the rigid outer part of the earth consisting of the crust and upper mantle.
  2. 6. the cause of convergent boundaries
  3. 7. when one plate moves under another
  4. 11. the first layer
  5. 14. the outer part of the core
  6. 15. a fracture or zone of fractures between two blocks of rock
  7. 17. it is below the lithosphere
  8. 18. when two tectonic plates bump into each other
  9. 19. the mostly-solid bulk of Earth's interior
Down
  1. 1. the inner part of the core
  2. 2. a sudden movement of materials within the Earth
  3. 3. the biggest plate
  4. 5. helps track plate movement
  5. 8. when two tectonic plates move away from each other
  6. 9. the thickest layer
  7. 10. a famous super continent
  8. 12. when they move past each other
  9. 13. when two tectonic plats push into each other
  10. 16. long, narrow depressions on the seafloor that
  11. 19. hot liquid under the earths crust