Chapter 7 Vocabulary

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