Chapter 7 Ashley Trainor

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Across
  1. 5. which suggested that continents are in constant motion on the surface of earth
  2. 9. as a slab sink, it pulls on the rest of the plate with force
  3. 10. a state in which magnetized objects, such as compass needles, will orient themselves to point north
  4. 12. occurs and the magnetic field reverses direction
  5. 13. the denser plate sinks below the more buoyant plate
  6. 14. forms where two plates separate
  7. 15. The cold rigid outermost rock layer
  8. 16. is the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
Down
  1. 1. the circulation of material caused by differences in temperature and density
  2. 2. form where two plates collide
  3. 3. forms where two plates slide past each other
  4. 4. all the continents were once part of a supercontinent
  5. 6. a state in which magnetized objects would reverse direction and orient themselves to point south
  6. 7. mountain ranges in the middle of the ocean
  7. 8. state that earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other
  8. 11. rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force