| A | B |
|---|
| Asthenosphere | Weaker region of mantel located below the lithosphere. |
| Continental Drift | The idea that explains how continents move. |
| Continental Volcanic Arc | Result of melting plates under a continent. |
| Convergent Boundary | Where plates move together from subduction. |
| Deep-ocean Trench | The deep area as a result of plate subduction. |
| Divergent Boundary | A place where plates move apart |
| Hot Spot | A place in the plate where magma melts though and produces a volcano. |
| Lithosphere | The crust of the Earth. |
| Mid-ocean Ridge | The ridge that creates sea floor spreading the Atlantic Ocean. |
| Normal Polarity | The current situation where the North pole is near the Magnetic North pole. |
| Paleomagnetism | The study of the direction of the magnetic field in the past. |
| Pangaea | First major super continent in the world. |
| Plate | The broken pieces of the lithosphere. |
| Plate Tectonics | A modern view of continental drift. |
| Polar Wandering | The movement of the magnetic pole |
| Reverse Polarity | When North was South and South was North |
| Rift (Rift Valley) | Valleys that are formed from spreading plates. |
| Seafloor Spreading | The place where the basaltic plate continues to move apart. |
| Subduction Zone | Where a less dense plate is overriding a divergent plate. |
| Transform Fault Boundary | A place where plates grind past one another. |
| Volcanic Island Arc | Result of an ocean plate melting under another ocean plate. |
