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29 March, 10:22

The Earth has a metal core because

a. the metals were attracted to the core of the Earth by the Earth's magnetic field.

b. a large metal asteroid impacted the Earth and deposited its metal at the center of the Earth.

c. metals are heavier than rocky material and the metals sank to the core when the Earth was molten.

d. fusion of the lighter elements in the core produced the metals.

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  1. 29 March, 12:22
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    c. metals are heavier than rocky material and the metals sank to the core when the Earth was molten.

    Explanation:

    When the sun formed after the collapse of a large giant molecular clouds (GMC) it caused an immense generation of heat and pushed away most of the low-density materials, but heavier elements remained. This heat vaporized the material around the sun.

    The heating resulted in the formation of melted zones where high density elements melted and moved towards the core. This resulted in the planetary differentiation of Earth.
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