Question: why is there no gravity on the moon?

Katie Marriott answered on 13 Jun 2011:

The moon does actually have gravity!

Gravity depends on the size of the object. So a big planet like Jupiter will have lot more gravity than Earth. The moon is about 1/4 the size of the Earth so it has a lot less gravity. If you could make a giant football as big as the Earth is would also have gravity! Scientists are not sure why large objects have gravity.

If you watch videos of people walking on the moon you can see they can jump a lot higher and further than they would be able to on the Earth. If there was no gravity they would go shooting off in to space!