Question

compositon of the earths crust

Answer 1

Answer: Tarbuck.

Explanation:

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:

Earth crust os made up of several elements:oxygen 46.6% by weight,silicon 27.7%,aluminium 8.1%,iron 5%,calcium 3.6%,sodium 2.8%,potassium 2.6% and magnesium 2.1%.

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