Plate Tectonics

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Across
  1. 5. molten rock in earth's surface
  2. 7. study of alignment of magnetic minerals in rocks
  3. 8. breaking apart of earth's surface
  4. 9. undersea mountain chain with steep narrow valley
  5. 11. solid plastic part of the mantle
  6. 14. boundary where 2 tectonic plates are moving away from earth other
  7. 16. single, large ocean that covered earth's surface
  8. 18. single landmass that broke up to form continents
Down
  1. 1. solid outer layer of earth made of crust and upper part of mantle
  2. 2. process where oceanic seafloor forms when magma rises pushing older seafloor away
  3. 3. boundary where 2 plates are sliding past each other
  4. 4. theory explaining how lithosphere moves and changes shape
  5. 6. piece of lithosphere with unique geologic features
  6. 10. supercontinent that formed 300 million years ago
  7. 12. sudden movement of earth's surface
  8. 13. boundary where 2 tectonic plate are moving toward each other
  9. 15. movement of heated material due to differences in density (different temperatures)
  10. 17. can form when magma erupts onto earth's surface