2B40.u4 - Bowling Ball Densities
To demonstrate the differences in densities of bowling balls that look the same, but are very different. Also, a pumice rock is available to show that rocks can indeed float.
Fill the large fish tank with water from the tap. Be sure to have the blue plate on the bottom of the fish tank to protect from drops of the bowling balls. Provide LOTS of paper towel. Inform professors to use 2 hands when moving the bowling balls in and out of the fish tank.
With the fish tank full of water, using two hands, lower each bowling ball into the water. Observe the differences between the two bowling balls. One floats and one sinks, while the pumice rock floats.