Comparing mineral species among Earth and the other terrestrial planets and rocky moons: Most minerals form from magma, so all previously molten planetary bodies would have about the same minerals They are the same, because most minerals can form anywhere in the solar system Earth has a much greater variety of minerals than other bodies, because of the presence of water and free oxygen We don't know enough about the minerals on other planets to form any inferences Each planetary body has a unique set of minerals, depending on its particular geologic development

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