(3) Out of which layer of the crust is most of the oceanic base formed?
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(4) What compounds does the mantle consists of ?
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(5) In which of the layers of the interior of the earth is magma formed?
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Answer: I know (4) it is:
In terms of its constituent elements, the mantle is made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium. There's also iron, aluminum, calcium, sodium, and potassium. These elements are all bound together in the form of silicate rocks, all of which take the form of oxides.
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