Object: Some cooking oil and tap water and a large clear glass into which they can be poured. The water should not be ice water and it is better if you don’t shake it too hard because it takes a while for it to separate but you should shake it a little to prove your point. By the way, be sure the color of the oil is distinguishable.

Good morning to you, fellow scientists. Isn’t it a wonderful day to conduct experiments? How many here like to work experiments? Wonderful! Before we make the experiment, I want to show you what we have. Here is a bottle of oil, "cooking oil," like your mother uses when she bakes a pie or french fries potatoes. Now for our experiment we are going to ca…