Color Milk

The students thought this was a neat experiment.  We poured whole milk into a flat tray, added drops of food coloring, and then added drops of dish soap.  As the drops of soap were added we were able to see how the colors swirl together.  I asked the students why they thought this happened.  They had some responses, but none of them were correct.  So I explained how this worked.  The main job of dish soap is to break down fat.  When the soap is dropped into the milk it tried the break down the fat in the milk.  While it was doing that, the colors scattered and swirled together.  Try this experiment at home and see the colors swirl!