Plate Tectonics

2. forms where two plates slide past each other
3. form where two plates collide
5. a state in which magnetized objects, such as compass needles, will orient themselves to point north
6. the denser plate sinks below the more buoyant plate in a process
9. is the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
11. the circulation of material caused by differences in temperature and density
12. suggested that continents are in constant motion on the surface of Earth
13. the cold and rigid outermost rock layer
14. rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force called
15. Earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other

1. a state in which magnetized objects would reverse direction and orient themselves to point south
4. forms where two plates separate
7. the mountain ranges in the middle of the oceans
8. occurs and the magnetic field reverses direction
10. A theory that all the continents were connected at some point