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Home Q & A Board Science-Related Homework Help Physics
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symbo symbo
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7 years ago
Why is it that terrestrial planets are thought to have dense iron cores?
A)   Thermonuclear reactions produced iron as a fusion product in the earlier phases of planetary evolution (thermonuclear accretion).
B)   During the formation of the planets, heavy elements accumulated first, follwed by the accretion of lighter elements onto them (bimodal accretion).
C)   The planets were molten early in their life, and the heavy elements sank and lighter materials floated to the surface (planetary differentiation).
D)   Magnetism in the iron was sufficiently powerful to pull iron atoms to the center as the planet formed (magnetic sorting).
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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symbo Author
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#2
6 years ago
It's correct Smiling Face with Open Mouth
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