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CH 7 Plate Titanic
Question | Answer |
---|---|
Pangaea | He proposed that all the continents were once part of a super-continent called Pangaea. |
Continental drift | Wegener proposed the hypothesis of the continental drift. |
Seafloor spreading | Seafloor spreading is the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge. |
Normal polarity | A state in which magnetized objects, such as compass needles, will orient themselves to point north. |
Magnetic reversal | Magnetic reversal occurs and the magnetic field reverses direction. |
Reversed polarity | A state in which magnetized objects would reverse direction and orient themselves to point south |
plate tectonics | states that earths surface is made of ridgid slabs of rock |
lithosphere | it is made up of the crust and the solid, uppermost mantle. |
divergent plate vocabulary | forms where two plates separate. |
convergent plate vocabulary | forms where two plates slide past each other. |
subduction | the area where denser plate descends into earth along a convergent |
convection | the circulation of material |
ridge push | ridge push moves lithosphere |
slab pull | scientists are still |