would the weight density of water be different on the moon than it is on earth
Weight, yes. Mass, no. Density is mass per unit volume. Mass and Volume are constant no matter earth or moon. So it would be the same. Since weight does change because it is calculated with gravitational effects then yes you would get a different result.So mass, no.n the Moon, the same volume of water would weigh about 1/6 what it does on Earth. So weight density of water, or anything, on the Moon would be 1/6 compared to it on Earth. Starski Â· 6 years ago. Thumbs up.