Why does an object have a different weight on the moon than it does on earth? everything is weightless in space. objects move more slowly on the moon. there is no air on the moon, so objects are lighter. the earth and moon have different values for the acceleration due to gravity.

-- "Weight" is the gravitational attraction between TWO objects.

-- Its 'strength' depends on the mass of BOTH masses.
If either mass changes, then the gravitational force between them changes.

-- Your 'weight' on Earth depends on your mass and the Earth's mass.

-- Your 'weight on the moon depends on your mass and the Moon's mass.

From the list of choices, the best one is  "The Earth and moon have
different values for the acceleration due to gravity.", although that
doesn't really explain much.

The rocks expand when there hot/warm  and contract when they are cold.

The answer is 12, for the points