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Portable Network Graphic  |  1996-04-23  |  27KB  |  488x358  |  8-bit (186 colors)
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OCR: STRUCTURE ATMOSPHERIC COMPOSITION Mantle Nitrogen 77% Outer core Oxygen 22% Water vapor, argon, carbon dioxide, and Atmosphere trace gases 1% Crust Core LAYER THICKNESS COMPOSITION Crust 6-40 km (4-25 miles) Silicate rock Mantle 2,800 km (1,750 miles) Mainly solid silicate rock Outer core 2,300 km (1,430 miles) Molten iron and nickel Inner core (radius) 1,200 km (750 miles) Solid iron and nickel