Chapter 7 Vocab

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