Earth Science

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Across
  1. 4. a geological process in which tectonic plates split from each other
  2. 5. plates slide horizontally and past one anothe
  3. 7. waves in the stratified rocks of the earth's crust
  4. 9. two plates move toward each other
  5. 13. a central valley formed at the summit of the oceanic ridges
  6. 14. caused by forces that are exerted on the edges or interior of the material
  7. 17. a fracture or zone of fractures between two blocks of rock
  8. 18. circulation of material caused by the differences in density
  9. 19. gravitational force that causes a plate to move away from the crest of an ocean ridge
  10. 20. line represents an are of shear
Down
  1. 1. an outlet for the molten materials to go out
  2. 2. largest ocean
  3. 3. a fault on which two blocks slide past one another
  4. 6. regions below sea level
  5. 8. two plates move away
  6. 10. are inclined fractures where the blocks has mostly shifted vertically
  7. 11. change in shape or size resulting from applied forces (deformation)
  8. 12. narrow, elongated depressions on the seafloor
  9. 15. largest layer of the earth
  10. 16. force exerted by the weight of the subducted slab