Chapter 7 vocabulary Plate Tectonics

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Across
  1. 3. forms where two plates slide past each other
  2. 5. occurs and magnetic fields reverse
  3. 7. circulation of materials caused by differences in temperature and density
  4. 9. ridged rock slabs or plates that make up earth surface
  5. 11. magnetic objects reverse themselves and point south
  6. 13. form where two plates collide
  7. 16. new crust forms along mid-ocean ridge and old crust move away
Down
  1. 1. mountain ranges in the ocean
  2. 2. suggested that continents are in constant motion on the surface of the earth
  3. 4. forms where two plates separate
  4. 6. the cold and ridged outermost rock layer
  5. 8. as a slab sinks, it pulls on the rest of the plate with force
  6. 10. all the continents were one big continent
  7. 12. the denser plate sinks below the more buoyant plate
  8. 14. where magnetized objects will point in the northern direction
  9. 15. rising material at mid-ocean ridges creates the potential for plates to move away from the ridge with force