(outer outer core core) with thickness from the earth's surface, about 2 900 - 5 000 kilometers, Consisting of iron and nickel in molten images, and has high heat with temperature about 6200 - 6400 has relative density 12.0 and this part is the liquid state
off the inner core (inner core) is the world center. There, รัศมีประมาณ 1 000 kilometers temperatures around 4 300 - 6,,200 and enormous pressure. Make this is solid state. Contain iron and nickel are in solid density, relative 17.0.
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