Plate Tectonics

4. where two plates slide past eachother
6. The mountain ranges in the middle of the oceans.
8. occurs and the magnetic field reverses direction
11. is the process by which new oceanic crust forms along a mid-ocean ridge and older oceaniccrust move away from the ridge
12. where two plates form separate
13. all the continents were once a supercontinent
16. is where the circulation of material is caused by differences in temperature.

1. states that the earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other.
2. a state in which magnetized objects would reverse direction and orient to point south.
3. slab pull is thought to be a more significant force than ridge push in moving tectonic plates.
5. ridge push moves lithosphere in opposite directions away from the mid-ocean ridge.
7. two plates collide.
9. as compass needles, will orient themselves to point worth.
10. suggested that continents are in constant motion on the surface of the earth.
14. a state in which magnetized objects
15. the denser plate sinks below the more buoyant plate in a process called subduction.