The force of gravity is different from mass because mass is the amount of stuff inside an object and gravity is the amount of pull on an object.
Inertia means that if an object is in motion it stays in motion. If an object is at rest it stays at rest.
The sun has such a big pull of gravity that it keeps all the planets in their orbit
You would weigh only 1/6 of your weight ,on earth, than you would on the moon because the moon is a lot smaller than earth so the pull of gravity would be less and you would weigh less.
Inertia means that if an object is in motion it stays in motion. If an object is at rest it stays at rest.
The sun has such a big pull of gravity that it keeps all the planets in their orbit
You would weigh only 1/6 of your weight ,on earth, than you would on the moon because the moon is a lot smaller than earth so the pull of gravity would be less and you would weigh less.