I came here to say this. A chunk of mass that "weighs" 100 grams is still 100 grams on the moon. A chunk of mass that weighs 1 pound does not weigh 1 pound on the moon.

I think in most common usage people use pounds as a measure of mass (convertible to kg). It’s why when you really mean force the abbreviation lbf (pound-force) exists, as opposed to the now more usual pound-mass.