Chapter 7 Gabrielle Carr

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Across
  1. 2. the mountain ranges in the middle of the oceans
  2. 3. it sometimes occurs when a magnetic feild reverses direction
  3. 7. as a slab sinks it pulls on the rest of the plate with a force
  4. 9. forms where to plates slide past each other
  5. 12. a theory that the continents were once one big Continent
  6. 13. rising material at mid-ocean ridges creates the potential for plates to move away from the ridge
  7. 14. rock slabs in earths crust that move against each other respectfully
  8. 16. a state in which objects such as compass needles will orient themselves to point north
Down
  1. 1. forms where two plates separate
  2. 4. the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crusts move away from the ridge
  3. 5. form where two plates collide
  4. 6. the cold and rigid outermost of earth's surface
  5. 8. the continents slowly drifting apart
  6. 10. when one plate goes under the other one due to the density and weight of it
  7. 11. a state in which magnetized objects would reverse direction and orient themselves to point south
  8. 15. the circulation of material caused by differences in temperature and density