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What is believed to be the composition of the Earth's core?

doit_the_clown

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What is believed to be the composition of the Earth's core?

What is believed to be the composition of the Earth's core?
A)   About 80% iron and 20% lighter elements
B)   About ¼ iron and ¾ lighter elements
C)   About ½ iron and ½ lighter elements
D)   Essentially pure iron

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Discovering the Universe

Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein

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