Chapter 10 crossword- extra credit

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Across
  1. 4. North America and Eurasia were formed when a rift separated the continent of
  2. 5. Who hypothesized of continental drift
  3. 6. single large ocean that covered earths surface during Pangaea time
  4. 10. what ocean is tectonic plates are expanding which ocean
  5. 12. forming cracks in weakened continental or oceanic crust
  6. 13. study of the alignment of magnetic minerals in rock
  7. 15. plates are colliding
  8. 17. processes taking place in the trenches
  9. 19. plates are sliding horizontally
  10. 20. more dense currents
Down
  1. 1. a thin outer shell of Earth that is broken into several blocks
  2. 2. plates are separating
  3. 3. earths crust breaks apart is called
  4. 7. seamount colliding with continent and forming a mountain chain on continent is an example of
  5. 8. super continent that formed 300 million years ago
  6. 9. less dense currents
  7. 11. tectonic plates are giant slabs of
  8. 14. layer of plastic rock just below the lithosphere
  9. 16. an undersea mountain range that forms at a divergent boundary
  10. 18. pice of lithosphere with unique geologic history