| A | B |
|---|
| a section of the lithosphere that slowly moves over the aesthenosphere, carrying pieces of continental and oceanic crust | plate |
| a well-tested concept that explains a wide range of observations | scientific theory |
| the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle | plate tectonics |
| a break in Earth's crust where masses of rock slip past each other | fault |
| a deep valley that forms where two plates move apart | rift valley |
| a plate boundary where two plates move toward each other | convergent boundary |
| a plate boundary where two plates move away from each other | divergent boundary |
| a plate boundary where two plates move past each other in opposite directions | transform boundary |
