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| Question | Answer |
|---|---|
| Name given to Wegners idea of a super continent that drifted apart | Paleoclimates |
| Name given to Wegners idea of a super continent that drifted apart | Continental Drift |
| From Greek meaning “all lands”; name given to the supercontinent that formed at the end of the Permian | Pangea |
| Longest mountain chain on earth | Oceanic ridge system |
| Is the story of lathe scale movement and deformation of the crust and mantle as it reals to the existence and movement of rigid plates of rock over a weak or plastic layer in the upper mantle | Plate tectonics |
| Made of the solid, uppermost part of the mantle & crust. The rock is cool, hard and strong, thickness 75-125km; avg. 100km. | Lithosphere |
| weak, plastic layer below lithosphere to depth of 350km; 1-2% is molten; weak & plastic due to high temperature and pressure | Asthenosphere |
| These plates are in constant motion, slowly sliding across the surface of the earth | Lithospheric plates |
| Fracture in the lithosphere separating two or more plates; three ways for plates to move past each other | Plate boundary |
| Plates move away from each other, then magma rises from the asthenosphere to fill the gap | Divergent Boundary |
| Is the result of a divergent boundary on a continent | Continental rifting |
| Plates moving toward each other | Convergent Boundary |
| Is a long, narrow belt where the lithosphere is sinking into the mantle | Subduction zone |
| From where oceanic crust sinks into the mantle. These trenches collect sediment that is scarred from the subduction plate | Deep ocean trenches |
| Plates slide horizontally past each other | Transform Boundary |
| Relatively small rising column of hot, plastic mantle rock; probably rise due to localized heating in the mantle | Mantle Plume |
| Is an area of persistent volcanic activity often in the middle of a plate and usually produces basaltic lava | Hot spot |
| The ancient record of the magnetic field | Paleomagnetism |
| Temperature at which iron-bearing materials gain their magnetization | Curie point |
| Is when the poles remain fixed while the continents move | Polar wander |
| Can detect the direction of paleomagnetism by either flying them over rocks or placing them on ships that sail back-and-forth over the ocean ridges | Magnetometers |
| Upward and down or movement of fluid due to heating | Convection cells |
| When the plate is pushed up at spreading center by rising magma and gravity start pulling it back down at subduction zones the cool, dense plate, pulled back into mantle | Dodge Push& Slab Pull |
Created by:
Jessilester