Answer:
Hey there!
Mass is often related to weight, but is not the same thing. This is because mass is the amount of matter in an object, and is measured in grams and kilograms. Weight is the gravitational pull of an object, and is different based on where you are. This might be a little complicated, but just remember that smaller objects have less gravitational pull than larger objects. Thus, your weight on the moon will be less than your weight on earth, but your mass will be constant in both places.
Let me know if this helps :)