Plate tectonics

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Across
  1. 2. the largest plate
  2. 3. when one plate goes under another plate
  3. 6. convergent plate boundaries can produce this
  4. 10. when two plates crash together
  5. 11. rigid layer of the uppermost mantle and crust
  6. 14. an opening in the crust where lava and hot gases can erupt
  7. 15. the ocean floor
  8. 16. plates glide over Earth’s ____
  9. 17. narrow valley between two diverging continental plates
  10. 18. last name of person who developed plate tectonics theory
Down
  1. 1. when two plates go in the opposite direction
  2. 4. the center of the Earth
  3. 5. how many major plates are there in the world?
  4. 7. a type of convergent plate boundary.
  5. 8. the study of earthquakes
  6. 9. segment of the lithosphere that move and change shape
  7. 12. When two plates slide past each other
  8. 13. when all the continents were once joined together