Chapter 8

2. The upward vertical motion of the Earth's surface.
5. A curved line of volcanoes that forms parallel to a plate boundary.
6. Parallel forces acting in opposite directions.
8. The equilibrium between continental crust and the denser mantle below it.
11. When large regions rise vertically with very little deformation.
14. An area of many fractured pieces of crust along a large fault.
15. A change in the shape of rock caused by stress.
17. Made from layers of cooled molten rock and ash.
18. Deep, underwater troughs created by one plate subducting under another plate at a convergent plate boundary.
19. Squeezing stress.
20. Areas of subsidence and regions with low elevation.

1. An extensive area of level or rolling land.
3. Made of layers of rocks that are folded.
4. _______ move only 1-9 cm per year, creating tall mountains.
7. When divergent boundaries occur within a continent, they can form ________, or enormous splits in Earth's crust.
9. Where tectonic plates slide horizontally past each other.
10. Parallel ridges that form where blocks of crust move up or down along faults.
12. The downward vertical movement of the Earth's surface.
13. Flat regions with high elevation.
16. Stress that pulls something apart.