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12 Cards in this Set
- Front
- Back
Theory |
An idea that is suggested or presented as a possibly true but is not known or proven to be true |
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Theory of Plate Tectonics |
Is a scientific theory that describes the large scale motion of earths lithosphere |
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Continental Drift |
A theory that explains the formation alteration and extremely slow movement of the continents across the Earths crust |
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Sea floor Spreading |
A process in which new ocean floor is created as molten material from the earth mantle rises in margins between plates or ridges and spreads out |
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Convergent Boundary |
A tectonic boundary where two plates are moving toward each other |
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Subduction Zone |
A convergent plate boundary where one plate subducts beneath each other usually because it is denser |
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Trench |
Long narrow ditch caused by two plates pushing together |
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Pangea |
Supercontinent that existed during the late Paleozoic and early Mesozoic eras,forming about 300 million years ago. |
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Divergent boundary |
A boundary where two plates move away from each other and new crust is forming magma rises between two plates |
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Sea floor spreading |
Process in which new ocean floor is created as molten material rises and spreads out. |
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Convection currents |
The transfer of heat by the mass of heated particles into a cooler area |
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Rift |
A large area of earth plates moving away from each other. |