| A | B |
|---|
| Continental Drift | The theory that states all the world's landmasses were once joined |
| Alfred Wegener | First to propose the theory of continental drift |
| Convergent Boundary | When plate boundaries collide |
| Divergent Boundary | When plate boundaries move away form each other |
| Transform Boundary | When plate boundaries move in opposite directions past each other |
| Subduction | When a convergent boundary is pushed under another |
| Sea Floor Spreading | A divergent boundary where new ocean floor is formed |
| Pangaea | A supercontinent that was formed 250 million years ago |
| Harry Hess | Proposed the theory of Sea Floor Spreading |
| Plate Tectonics | A theory of the formation and movement of crustal pieces |
| Trench | A deep valley on the ocean floor |
| Types of Convergent Boundaries | Oceanic-Oceanic, Oceanic-Continental, and Continental- Continental |
| Gondwanaland | Break during the Mesozoic Era forming Laurasia and |
| Mountains | Forms when Continental-Continental boundaries collide |
| Volcanoes | Forms when a plate boundary is subducted under another |
| Earthquakes | Forms when a transform boundary slides in opposite directions past each other |
| San Andreas Fault | Formed by the movement of transform boundaries on land |
| Himalayas | The result of two continental plates colliding |
| Great Rift Valley | A fairly new divergent boundary beginning to split Africa in two |
| Mariana Trench | Created by the subduction of two oceanic plates |
