Chapter 7

1. Earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other
5. It occurs and the magnetic field reverses direction.
8. The denser plate sinks below the more buoyant plate in a process
10. Forms where two plates separate
11. Forms where two plates slide past each other
12. The circulation of material caused by differences in temperature and density
13. A state in which magnetized objects, such as compass needles, will orient themselves to point north
15. Continents that are in constant motion on the surface of Earth
16. Rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force

2. The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
3. As a slab sinks, it pulls on the rest of the plate with a force
4. The cold and rigid outermost rock layer
6. A state in which magnetized objects would reverse direction and orient themselves to point south
7. form where two plates collide
9. The mountain ranges in the middle of the oceans
14. All the continents were once part of a supercontinent