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PCMS 6 Earth's layer
Earth's layers
Term | Definition |
---|---|
inner core | a solid sphere of metal, mainly nickel and iron, at Earth's center |
outer core | a layer of molten metal, mainly nickel and iron, that surrounds Earth's inner core |
mantle | the layer of earth between Earth's outer core and crust; Earth's thickest layer. |
crust | the thin, outer layer of cool rock above Earth's mantle. The thinnest layer. |
lithosphere | the layer of Earth made up of the crust and the rigid rock of the upper mantle |
tectonic plate | one of the large, moving pieces into which Earth's lithosphere is broken and which commonly carry both oceanic and continental crust. |
asthenosphere | the layer in Earth's upper mantle directly under the lithosphere |