Earth's internal structure

Earth's internal structure

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Credit: JOSE ANTONIO PENAS/SCIENCE PHOTO LIBRARY

Caption: Earth's internal structure, computer artwork. The Earth has an equatorial diameter of 12,756 kilometres. It has a core of solid iron and nickel (red), which is around 2500 kilometres in diameter. This is surrounded by a molten outer core (orange) which is around 7000 kilometres wide. Convection of molten metals in the outer core is responsible for the generation of Earth's magnetic field. Between the outer core and the surface crust is the mantle (dark orange). This is a highly viscous liquid, on which the solid plates of the crust (grey) float. The crust ranges in thickness from around 5 to 70 kilometres.

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Keywords: artwork, core, crust, cut-away, cutaway, earth, earth structure, geographical, geography, geological, geology, half, halved, illustration, inner, internal, layer, layers, liquid, mantle, molten, outer, planet, rock, section, sectioned, structure

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