a) the Moon formed at the same time and place as the Earth.
b) the Moon formed from the impact of a Mars-‐sized object with an already chemically differentiated Earth.
c) the Moon formed from material flung off the Earth before chemical differentiation occurred.
d) None of the above.
b) the Moon formed from the impact of a Mars-‐sized object with an already chemically differentiated Earth.
c) the Moon formed from material flung off the Earth before chemical differentiation occurred.
d) None of the above.
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b) the Moon formed from the impact of a Mars-‐sized object with an already chemically differentiated Earth.
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B)