Mass is the matter inside a thing Expressed in metric kilos and grams Or else in Imperial “slugs” No, not those slimy garden bugs [Break] Weight is the force of gravity's pull Newtons, N, our measurement unit "Weight" means mass commonly, but Physics is more specific [Break] Mass is constant, weight depends on Where the measurement is done Mass is given in kilos and grams Weight in newtons, capital N Weight on gravity depends But mass only on what’s within [Break] A kilo here weighs ten newtons On Mars though, it’s roughly four As for planets higher G A kilo there weighs more [Break] Where gravity's less than Earth’s You and I are lighter too And where the gravity's more Heavier us could far less do [Break] Mass is constant, weight depends on Where the measurement is done Mass is given in kilos and grams Weight in newtons, capital N Weight on gravity depends But mass only on what’s within [Break] Mass though always is the same Regardless of the place If nothing's added, nor deducted A gram stays a gram through time and space
