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Layers of the Earth
Earth's Physical Layers and Chemical Composition
Term | Definition |
---|---|
crust | surface layer of earth, composed of silicon, oxygen, and aluminum |
mantle | layer below the crust, made of silicon, oxygen, and magnesium |
core | center of the Earth, made mostly of metal iron |
lithosphere | physical layer that is divided into tectonic plates |
asthenosphere | plastic-like layer where Earth's plates move |
mesosphere | lower layer of the mantle |
outer core | made of liquid iron and nickel |
inner core | made of solid iron and nickel |