A 1-kg mass at the surface of Earth weighs 9.8 N, but the same 1-kg mass at the surface of the Moon weighs only
1.6 N. What property of Earth and the Moon is most responsible for this difference in weight?

The Moon has less mass than Earth.

The Moon is rounder than Earth.

The Moon is larger than Earth.

The Moon is 385,000 km from Earth.