Question

What is the composition of Earth's crust?​

Answer 1

Explanation:

Lutgens and Edward J. Tarbuck, Earth's crust is made up of several elements: oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percent.

Answer 2

Explanation:

The composition is:

a- SIAL and SIMA

b- Semi molten Asthenosphere

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