| A | B |
|---|
| Pangea | supercontinent that existed millions of years ago |
| Mountain Range | formed from a collision of 2 pieces of continental crust at a converging boundary |
| transform boundary | two plates slide past each other |
| rift valley | forms at a divergent plate boundary |
| fossil | trace of an ancient organism that has been preserved in rock |
| Mid-ocean ridge | form longest mountain ranges on Earth |
| Alfred Wegener | theory of continental drift |
| subduction | cooler, more dense crust sinks beneath a deep ocean trench |
| convection current | causes movement of Earth's plates |
| divergent boundary | where two plates pull apart |
| convergent boundary | place where two plates come together |
| plate tectonics | theory that says Earth's lithosphere is in constant motion |
