| Question | Answer |
|---|---|
| Who was Alfred Wegener? | He was the scientist how hypothesis continental drift |
| Continental drift? | Continents once formed a single landmass and broke apart |
| Mid-ocean ridge? | Undersea mountain ranges through the center of narrow valleys |
| Sea-floor spreading? | The process by which new oceanic lithosphere forms as magma rises |
| Plate tectonics? | Is the theory that explains how continents move |
| Lithosphere? | The lithosphere forms a thin outer shell of earth |
| Asthenosphere? | Is a layer of rock just below the lithosphere |
| Divergent boundaries? | Is two plates that move away from each other |
| Convergent boundaries? | Are boundaries that form where two plates collide |
| Transform boundary | The boundary at which two plate slide past each other |
| Rifting | Is the process of continents break apart |
| Terrance? | Is a piece of lithosphere that has a unique geologic history |
| Supercontinent cycle? | The process by a which supercontinents form and break apart |
| Pangea? | A supercontinents that formed about 300 million years ago |
| Panthalassa? | The single large ocean that surrounded Pagaea |
| Subduction zone? | The region along a plate boundary |
| Island arc? | Fluids released from the subducted plate causes mantle rock to melt |
| Ridge push? | As cooling rock sinks to the asthenosphere below its exert force |
| Slab pull? | The force exerted by the sinking plate |
