Chapter 7; Plate Tectonics - Madelyn Ashworth

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Across
  1. 3. magnetic field reverses directions
  2. 6. Process by which new oceanic crust forms along a mid-ocean ridge and older crust moves away from the ridge
  3. 9. Form where two plates collide
  4. 11. The idea that the continents were once one big continent
  5. 12. The cold and rigid outermost rock layer
  6. 15. Where the heavier plate sinks below the lighter plate when they converge.
  7. 16. A state in which magnetized objects, such as a compass needle, will orient themselves to point north
Down
  1. 1. Forms where two plates slide past each other
  2. 2. Mountain ranges in the middle of the oceans
  3. 4. Suggested that continents are in constant motion on the surface of Earth
  4. 5. Forms where two plates seperate
  5. 7. Rising mantel material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force
  6. 8. Circulation of material caused by differences in temperature and density
  7. 10. A state in which magnetized objects would reverse direction and orient themselves to point south
  8. 13. As a slab sinks, it pulls on the rest of the plate with a force
  9. 14. Earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other