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7 Cards in this Set
- Front
- Back
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continental drift
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hypothesis stating that the continents once formed a single landmass, broke up, and drifted to their present locations
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Panagaea
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single landmass thought to have been the origin of all continents
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Panthalassa
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giant ocean surrounding Pangaea
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Mid-Atlantic Ridge
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undersea mountain ridge with a steep, narrow valley along its center
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mid-ocean ridges
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system of undersea mountain ranges that wind around the earth
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seafloor spreading
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movement of the ocean floor away from either side of a mid-ocean ridge
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Mesosaurus
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small extinct land reptile
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