Hi, I'm sparkles and I'm going to explain to you why weight depends on location and mass does not.
On Earth I weigh 1 pound and my mass is 10 grams.
On the moon I weigh 1/6 pound and my mass is 10 grams.
On mars I weigh 3/10 pound and my mass is 10 grams.
On Jupiter I weigh 2.53 pounds and my mass is 10 grams.
on The reason I weigh different amounts on different planets but my mass stays the same is that weight is a measure of how strongly gravity pulls on an object while mass is a measure of how much matter it is made of.