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