Question: Why is there less gravity on the moon?

Connor Macrae answered on 14 Jun 2015:

Gravity acts just the same on the Moon as it does here, but there is one big difference. If you are stood on the earth, you have all the mass of the Earth under your feet generating a gravitational attraction on you, making you weigh as much as you do! On the earth we can quantify gravity as an acceleration and call it ‘g’. You’ll probably have done calculations where g is equal to 9.8 or 10 for the earth.
The Moon however is much smaller than the earth, about 100 times smaller in fact, meaning there is less mass generating the gravitational attraction. Therefore, on the Moon the acceleration due to gravity pulling you down is only about g=1.6 due to there being less material under your feet. So if you stood on the Moon you would weigh about 1/6 of what you’d weigh on the Earth.