Question

5. How does the great-impact hypothesis explain the differences in density between the Earth and the moon?

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Answer 1

The great-impact hypothesis suggests that the Earth and the Moon were initially one body that was later separated by a giant impact. This impact created a huge amount of energy that caused the Earth to expand and become more dense and the Moon to become less dense. The resulting difference in density explains why the Earth is more massive and has a higher surface gravity than the Moon.