Plate tectonic cross word puzzle

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Across
  1. 6. A region of extremely high pressure underlying the lithosphere, where rocks are deformed by enormous stresses
  2. 7. An area of fracturing between rocks resulting from stress
  3. 9. A form of stress produced by the action of equal and opposite forces
  4. 11. margins Boundaries between plates
  5. 13. valley A long trough bounded by two or more faults
  6. 14. The uppermost division of the solid earth, representing less than 1% of its volume and varying in depth from 3-37 mi
  7. 16. A split between two bodies (for example, two plates) that once were joined
  8. 18. tectonics The name both of a theory and of a specialization of tectonics
  9. 20. core The part of earth between the mantle and the inner core
  10. 21. The center of Earth, an area constituting about 16% of the planet's volume and 32% of its mass
Down
  1. 1. The theory that the configuration of Earth's continents was once different than it is today
  2. 2. ridges Sub marine mountain ridges where new seafloor is created by seafloor spreading
  3. 3. Large movable segments of the lithosphere
  4. 4. A tectonic process whereby plates move away from each other
  5. 5. spreading The theory that seafloors crack open along thecrests of mid-ocean ridges and that new seafloor forms in those areas
  6. 8. drift The theory that the configuration of Earth's continents was once different than it is today
  7. 10. A tectonic process thatresults when plates converge and one plate forces the other down into Earth's mantle
  8. 12. The upper layer of Earth's interior
  9. 15. trench A deep depression in the ocean floor caused by the convergence of plates and the resulting subduction of one plate
  10. 17. The thick, dense layer of rock, approximately 1,429 mi
  11. 19. An area of rock that has been bent by stress