| A | B |
|---|
| plates | lithosphere is broken into separate sections called ___________. |
| scientific theory | a well tested concept that explains a wide range of observations. |
| plate tectonics | the geological theory that states that pieces of Earth's lithosphere are in constant, slow motion, driven by convection currents in the mantle. |
| theory of plate tectonics explains... | the formation, movement, and subduction of Earth's plates |
| transform boundaries | a place where two plates slip past each other, moving in opposite directions |
| divergent boundary | two plates move apart |
| rift valley | a deep valley that forms along the divergent boundary |
| Africa | the continent where the Great Rift Valley is located |
| convergent boundaries | the place where two plates come together |
| Pangaea | the great supercontinent 260 or so million years ago |
| Wegener | the scientist that hypothesized about a great superconinent |
