According to the large-impact hypothesis, why does the Moon have a low density?
A) Earth and its impactor had already differentiated.
B) The impactor did not have a large enough mass to differentiate.
C) The impactor formed in the outer solar system.
D) After the impact, the high-density material fell back to Earth.

Question

Quizplus · Accepted Answer

The large-impact hypothesis suggests that the Moon formed from the debris of a collision between Earth and a Mars-sized body. Both Earth and the impactor had already differentiated, meaning the denser materials were concentrated in their cores. The debris that formed the Moon was primarily from the mantles of these bodies, which are less dense than their cores, resulting in the Moon's lower density.

According to the Large-Impact Hypothesis, Why Does the Moon Have