The term buoyancy was first discovered by an ancient
Greek philosopher Archimedes. An object that is submerged
in water displaces water according to how much it weighs.
Archimedes discovered that the water will push against the
object with a force equal to the weight of the water that is displaced.
The amount of water that is moved depends on the density of the
object. A bowling ball and a beach ball have the same volume, but the
bowling ball weighs more, The bowling ball is able to move enough
water to be equal with it's own weight, so it floats.
