Physics for IGCSE & O level - Measurements And Units (Section 2 - No. 48)
Which of the following are correct regarding the core of the Earth?
The Earth does not have a core.
The Earth must have a high-density core.
The core is probably made of rocks.
The core is made of hydrogen and helium gas.
Explanation
The Earth has a high-density core, which is likely iron.
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