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Rocks in the Earth's mantle contain a higher percentage of _______ and _______ than do rocks in the Earth's crust. A. silicon and oxygen B. iron and magnesium C. magnesium and oxygen D. iron and silicon
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Rocks in the Earth's mantle contain a higher percentage of _______ and _______ than do rocks in the Earth's crust.

A.
silicon and oxygen
B.
iron and magnesium
C.
magnesium and oxygen
D.
iron and silicon

User Shantay
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2 Answers

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The mantle under the crust is about 1,800 miles deep (2,890 km). It is composed mostly of silicate rocks rich in magnesium and iron.
User Pull
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3 votes

Answer:

B. iron and magnesium

Step-by-step explanation:

User Timothy Jeffcoat
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