Briefly explain why Mercury, Venus, and the Moon do not have significant erosion. Relate erosional activity to planetary size and distance from the Sun
What will be an ideal response?
Both Mercury and the Moon have negligible atmospheres from the point of view of erosion. Their relatively small size led to only a small amount of outgassing to form an atmosphere in the first place, and made them unable to retain any atmosphere they did outgas. Venus has a great deal of atmosphere but very little erosion. Water erosion doesn't occur because the planet is too hot, related to its distance from the Sun. It lacks significant wind erosion because its slow rotation rate leads to very slow winds.
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