freddy's perfect puzzle

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Across
  1. 2. means sturdy and strong
  2. 5. this semi solid is what plates move on
  3. 8. the security of ultraviolet waves hitting humans
  4. 9. technology that is used to measure the ocean floor
  5. 11. the middle most part of the earth
  6. 12. the crust where the ocean is on top of
  7. 14. the currents that drive the plates
  8. 16. this is what is below the crust
  9. 17. he found plate tectonics
  10. 19. heated rock in the earth
  11. 21. when the magnetic poles reverse
  12. 23. the process of one plate going under the other
  13. 24. two plates pushing against each other
  14. 25. two plates separating from each other
Down
  1. 1. this is where the magma comes out and spreads the plates
  2. 3. this is what we live on today
  3. 4. two plates grinding against each other
  4. 6. what is created by a transform boundary
  5. 7. the supercontinent where all of the plates merged into one
  6. 10. the mineral that tells us when the magnetic poles flipped
  7. 13. the crust that continents are on
  8. 15. the plates that continents are on
  9. 18. this is what makes up the plates
  10. 20. the area in the mantle where the plates get moved and recycled
  11. 22. the only liquid layer in earth