Ninety percent of Earth is made up of which four elements?
A)iron,oxygen,silicon,and magnesium
B)oxygen,nitrogen,hydrogen,and silicon
C)magnesium,aluminum,silicon,and oxygen
D)silicon,calcium,aluminum,and iron

Question

Quizplus · Accepted Answer

The four most abundant elements in the Earth's crust are oxygen, silicon, aluminum, and iron, but when considering the whole Earth (including the core), the most abundant elements are iron, oxygen, silicon, and magnesium. This is because the Earth's core is primarily composed of iron and nickel, significantly influencing the overall elemental composition.

Ninety Percent of Earth Is Made Up of Which Four