Answered

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Which elements are found in a high proportion in Earth’s crust?

A.aluminum and iron

B.oxygen and silicon

C.calcium and sodium

D.potassium and magnesium

Sagot :

Acharlia2004idn
i think its calcium and sodium I'm not sure
Basically, this is a tricky question. And it has more than one answer. The elements that are found in a high proportion in Earth's crust are  oxygen, aluminium, iron, calcium, potassium, sodium, and magnesium.  But for your Option, I think it is B) Oxygen and Silicon. This is because Oxygen makes 46.6% while Silicon makes 27.7% of the Earth crust. They are like the highest.
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