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15 Cards in this Set
- Front
- Back
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continental Drift
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The continents drifted apart but used to fit together like a puzzle.
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Pangaea
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All land/ meaning that this is the word for the continents when they were connected.
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Panthalassa
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All seas/ there was one sea and ocean called panthalassa
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Mid-Atlantic Ridge
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An undersea mountain range with a steep, narrow valley running down its center.
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Mid-Ocean Ridges
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65,000 km long all around the earth
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Seafloor Spreading
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The ocean floor was moving, so the continents are moving too
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Plate Tectonics
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30 plates of lithosphere
it is acccumulated evidence supporting the hypothesis of continental drift and seafloor spreading led to the formulation of more far-reaching theory |
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Divergent boundry
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two plates moving away from eachother cause a divergent boundary
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Rift Valley
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a narrow valley created as the plates separate
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Convergent Boundary
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Crust comes together/ collides
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subduction Zone
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Area where a plate is going under another place
A deep ocean trench forms along a subduction zone |
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convection current
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the cycle of warm water rising and cold water sinking
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convection
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The transfer of heat throught the movement of heated fluid material.
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Transform fault Boundary
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forms where plates are grinding past each other
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Island Arc
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Part of the subducted plate melts, and the resulting molten rock rises to the surface along the trench to form a chain of volcanoes
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