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8 Cards in this Set
- Front
- Back
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asthenosphere
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plastic like layer of earth on which the lithosphere plates float and move around.
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cotinential drift
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Wegner's hypothesis that all cotinents were once connected.
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convection current
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current in Earth's mantle that transfers heat in Earth's interior and is driving force for plate tectonics.
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lithosphere
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rigid layers of eath about 100 km thick, made of the crust and a part of upper mantle.
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Pangaea
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large ancient landmass that was composed of all the continents joined together.
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plate
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a large section of the earth oceanic or continential drift.
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plate tectonics
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theory that earth's upper crust mantle is broken into plates that float and move around one a particular layer of mantle.
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seafloor setting
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Hess's theory that new seafloor is formed when magma is foced upward and towards the surface at a mid-ocean ridge.
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