Plate Tectonics Theory

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Across
  1. 5. collision of India-China plates created the ___ Mountains
  2. 7. divergent plates create a midoceanic ___ below the ocean
  3. 8. primary element of Earth's core
  4. 9. deep sea trenches formed by ___
  5. 13. sea floor spreading happens at a ___ boundary
  6. 14. supercontinent 250 million years ago
  7. 17. least dense layer of Earth
  8. 19. developed theory of Continental Drift
  9. 20. subduction happens at a ___ boundary
  10. 21. caused by subduction plates rapidly displacing water
  11. 22. vibrations caused by movement of tectonic plates
  12. 24. outermost, rigid layer of Earth, includes the crust and part of the upper mantle
Down
  1. 1. southern half of Pangea
  2. 2. solid, made of iron and nickel
  3. 3. increased temperature makes lower ___
  4. 4. northern half of Pangea
  5. 6. divergent plates create a ___ on land
  6. 10. liquid, made of iron and nickle
  7. 11. San Andreas fault is a ___ boundary
  8. 12. thickest of all the layers
  9. 15. putty-like portion of the mantle
  10. 16. periodically changes from north to south
  11. 18. hotter materials rise and cooler sinks
  12. 23. often found near a subduction zone