Earth Science,Chapter 7 Sections 1 & 2
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Created by:
talishious on March 4, 2012
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9 terms
Terms | Definitions |
|---|---|
 crust | the thin and solid outermost layer of the Earth above the mantle |
| mantle | the layer of rock between the Earth's crust and core |
| core | the central part of the Earth below the mantle |
| lithosphere | the solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle. |
| asthenosphere | the soft layer of the mantle on which the tectonic plates moves |
| mesosphere | the strong, lower part of the mantle between the asthenosphere and the outer core. |
| tectonic plates | a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle. |
| continental drift | the hypothesis that states that the continents once formed a single landmass, broke up, an drifted to their present locations |
| sea-floor spreading | the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies |
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