Mantle - The thick, soft layer beneath the crust, divided into the upper and lower mantle, Layer B - Diagram - Mantle, Layer C - Diagram - Outer Core, Layer D - Diagram - Inner Core, Layer A - Diagram - Crust, Crust - Solid outer layer of the earth beneath us, Outer Core - Temps 4,000 - 9,000 ℉; metallic nickel-iron elements in liquid state, Inner Core - Extreme temp (>9,000 ℉) & pressure; solid nickel-iron center, Ocean - closer to three fourths, 3/4, Land - closer to one fourth, 1/4,

Earth Structure - Basics

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