Question

The earth's core is known to contain iron. yet geologists do not regard this as a source of the earth mergnetisum . Why ?

Answer 1

The earth's core contain iron but in the molten state .The molten iron is not ferromagnetic material in nature.Hence this cannot be treated as a source of earth's magnetism.
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Answer 2

The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism. Why?

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The earth’s core contains iron in molten state which is not ferromagnetic in nature hence geologists do not regard this as a source of earth’s magnetism.

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