Plate Tectonics

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Across
  1. 2. Molten rock underneath the Earth
  2. 4. Alfred ____ first to term Pangaea
  3. 5. A sedimentary rock
  4. 7. South America and _______ were once joined
  5. 10. This word means 'change'
  6. 12. Mid-ocean ______ form when plates move apart
  7. 16. Oceanic & continental ___ float over mantle
  8. 17. Volcanoes spew ____ during an eruption.
  9. 18. Name of your science teacher
  10. 21. Heat & _____ can change a rock
  11. 22. Formed when two plates move towards each other
  12. 23. part of the mantle where plates float on
  13. 25. Diamonds are made up of pure
  14. 26. Outer layer of the Earth is solid rock
  15. 28. The study of the Earth and rocks
  16. 29. Method used to date artifacts
  17. 30. Earth crust and upper mantle form
Down
  1. 1. Supercontinent that formed millions of years ago
  2. 3. Earthquakes and landslides are known as
  3. 4. One of the agents of erosion
  4. 6. Pangaea broke apart 200 ______ years ago
  5. 8. Outer core is ________ rock
  6. 9. Geological hazard occurs when plates move
  7. 11. A fossil key to theory of Plate Tectonics
  8. 13. This type of rock includes basalt
  9. 14. two plates move apart
  10. 15. the breaking down of rocks
  11. 19. plates slide past each other
  12. 20. These currents occur in the mantle
  13. 24. A deep ocean _____ form when plates collide
  14. 27. two plates move towards each other