| A | B |
|---|
| Alfred Wegener | German scientists who hypothesized the Theory of Continental Drift. |
| Continental Drift | All continents were once joined together in a single landmass. |
| Pangaea | Single landmass consisting of all continents. |
| Mid Ocean Ridge | Area where molten material erupts along the ocean floor. |
| Subduction | When a denser plate sinks beneath a less dense plate, returning rock to the mantle. |
| Geologist | Scientist who studies forces that make and shape Earth |
| Inner core | Movement here results in Earth's magnetic field |
| Divergent boundary | Where two plates spread apart |
| Asthenosphere | Lithospheric plates float atop this. |
| Basalt | Oceanic plates are made of this |
| Fossil | Any trace of ancient organism that has been preserved in rock |
| Convergent plates | Mountains form here. |
| Plate movement | Results in changes in Earth's surface |
| Sea Floor Spreading | New material is continually added to the ocean floor |
| Transform Boundary | Where two plates slip past each other (think San Andreas Fault) |
