Tectonic plates in motion

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Across
  1. 5. The outer part of the earth
  2. 6. where two tectonic plates slide past each other
  3. 8. this part of the earth is between the crust and the core
  4. 11. where all of the continents were once a super continents
  5. 12. the theory of plates tectonics
  6. 14. layer of earths atmosphere
  7. 15. The only liquid layer of earth
  8. 16. A strong lower part of the mantle
  9. 17. the inner for the the center of the earth
  10. 18. the inner part of the earth
Down
  1. 1. when two tectonic plates collide
  2. 2. where two tectonic plates collide
  3. 3. one plate goes under another plate
  4. 4. the rocky shell the the earth
  5. 5. the nature of somethings ingredients
  6. 7. the soft plastic-like layer of the Mantle
  7. 9. Where the sea floor pulls apart
  8. 10. Properties the involve a reastion to an applied load
  9. 13. Something the moves plates