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plate tectonics
semester exam
| Term | Definition |
|---|---|
| Pangaea | all the continents were once part of a supercontinent |
| continental drift | suggest that continents are in constant motion on the surface of earth |
| mid-ocean ridge | the mountain ranges in the middle of the oceans |
| 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 rigid slabs of rocks or plates that move with respect to each other |
| lithosphere | The cold and rigid outermost layer |
| Divergent Plate Boundary | forms where two plates separate |
| Transform Plate Boundary | forms where two plates slide past each other |
| Convergent Plate Boundary | form where two plates collide |
| Subduction | the denser plate sinks below the more buoyant in a process |
| Convection | he circulation of material caused by differences in temperature and density |