Across
- 8. all the continents were a part of one supper continent
- 9. the denser plate sinks below the more buoyant plate
- 11. tectonics earth surface is made of rigid rock or plates that move with respect to each other
- 12. plate boundaries where two plates collide
- 13. polarity magnetized objects will orient themselves to point south
- 16. polarity magnetized objects such as compass needles will orient themselves to point north
Down
- 1. the cold rigid and outermost layer
- 2. plate boundary forms when two plates separate
- 3. drift continents are in constant motion
- 4. spreading is the process by which new oceanic crusts form along a mid-ocean ridge and older oceanic crust moves away from the ridge
- 5. the circulation of material caused by differences in temperature and density
- 6. reversal the magnetic field reverses direction
- 7. ridges mountain ranges in the middle of the ocean
- 10. push moves lithosphere in opposite directions away from the mid-ocean ridge
- 14. plate boundary forms where two plates pass each other
- 15. pull as a slab sinks it pulls the rest of the plate down