The difference between mass, density and weight please.
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Mass is a measure of how much matter there is
Density is a measure of how much mass there is per unit volume
Weight is the measure of how hard an object is pulled (force) by a gravitational field
If I have two 100 g objects (mass) and one is 10 cm^3 and the other is 100 cm^3 (volume), then they have two different densities. The 10 cm^3 one has a density of 10 g/cm^3 and the 100 cm^3 object has a density of 1 g/cm^3 . These are two different densities even though they both weigh 100 grams. 1 g/cm^3 is the density of water, and 10 g/cm^3 about the density of silver. Silver sinks in water because it has a higher density.
Weight only applies when you’re in a gravitational field (like here on Earth). Weight is simply mass times gravitational field (g=9.8m/s^2 here on Earth). If I have a 1kg object, it weighs 9.8 N (Newtons, a unit of force). On the moon (g=1.6m/s^2 ), that same 1 kg object will weigh 1.6 N. If you’re out in space (g = 0 m/s^2 ), all objects would be weightless (0 N)
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