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2 June, 15:57

Which two layers of Earth are mainly composed of iron and nickel

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  1. 2 June, 16:02
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    Two layers of solid rock with heated flowing rock between them. Next is the outer core. This is about 3,000 miles beneath the Earth's surface ... The lava is mostly made up of iron and nickel, which is why some geologists call it molten metal instead of molten rock.
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