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plate tectonics
semester exam
| Term | Definition |
|---|---|
| Pangaea | all the continents were once part of a super continent |
| continental drift | suggest that continents are in constant motion on the surface of the earth |
| mid ocean ridge | the mountain ranges in the middle of the ocean |
| seafloor spreading | the process by which new oceanic crust forms along a mid ocean ridge and older oceanic crust moves away from the ridge |
| plate tectonics | earths surface is made of ridge slabs of rocks or plates that move with respect of each other |
| lithosphere | the cold and rigid outermost layer |
| divergent plate boundary | forms where 2 plates separate |
| transform plate boundary | forms where 2 plates slide past each other |
| convergent plate boundary | form where 2 plates collide |
| Subduction | the denser plate sinks below the more buoyant plate in a process |
| convection | the circulation of a materiel caused by a difference in temperatures and density |
| k |