Plate Tectonics

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Across
  1. 4. layer of Earth below the lithosphere that flows like a liquid
  2. 5. pieces of rock that have been weathered
  3. 9. the reason something has occurred or is occurring
  4. 10. primary layer where plants and organisms live
  5. 14. occur along plate boundaries
  6. 15. the oceanic crust and the upper mantle
  7. 16. type of crust that is made up mostly of granite and is less dense
  8. 22. rock that requires heat and pressure
  9. 23. rock that is formed when lava cools and hardens
  10. 25. the only liquid layer of Earth
  11. 26. Father of Continental Drift
  12. 28. two events happening at the same time, but not causing one
Down
  1. 1. largest layer of Earth
  2. 2. large pieces of crust that are constantly moving
  3. 3. natural process that breaks down rock
  4. 6. Earth's supercontinent
  5. 7. top layer of soil made up of living and decomposed materials
  6. 8. the theory that the continents were once a giant landmass and have slowly drifted apart
  7. 11. type of crust that is made up mostly of basalt and is more dense
  8. 12. solid layer of rock
  9. 13. can be found in sedimentary rock
  10. 16. thinnest layer of Earth
  11. 17. the center of the Earth
  12. 18. process in which oceanic crust sinks below the less dense continental crust
  13. 19. hot molten rock
  14. 20. occurs along mid-ocean ridges
  15. 21. cycle that occurs in the mantle, where heated material rises then cools and sinks
  16. 22. tallest mountain in the Himalayas
  17. 24. rock with many layers
  18. 27. natural forces that move rocks