How is buoyancy different from density?
Buoyancy is the upward force that keeps things afloat. The net upward force is equal to the weight of the fluid displaced by the object in the fluid. Density =mass / volume. In other words, it is how closely packed the molecules are in a substance. Things that have a density greater than 1g/ml will sink in water. Things with a density less than 1g/ ml will float in water.
