SPINNING MOLECULES MAKE A RAINBOWBy Tommy Epp

PURPOSE What milk is best to make a soap molecule

dance?

HYPOTHESIS The colors will dance because the soap

molecules like fat and move to it. I think the best colorful design will appear in

the whole milk.

PROCEDUREI. Get the following:

1. Liquids w/ a range of fat(water, skim, 1%, 2%, whole, cream)

2. Shallow plate3. food coloring: red, green, yellow, and blue4. Q-tips5. dish soup

II. Pour a thin layer of milk in plate.III. Prop 1 drop of each food coloring in the milkIV. Put a drop of dish soap on a Q-tipV. Place Q-tip in milkVI. See what happens; Record observations

WATERMost of the color went down to the bottom. It made a circle shape.

SKIMStill had a circle shape, went a lot slower then water, had pointy pieces, no dancing

1% MILK

Very little difference from skim milk

2% MILKNo circle shape

Went slower than 1% milk

Had a lot of spikes

Maybe a bit of dancing

WHOLENo circle

Went slower than 2% milk

Star shape

No dancing

CREAMDifferent than all the others

A LOT of dancing

Moved VERY, VERY slowly

CONCLUSION My hypothesis was partly wrong

I said whole milk was best but really cream was better I think cream was better because cream had cooler

designs The designs danced more, had more curly, bumpy

edges I also liked cream because it was slower

I said the soap molecules went to fat Cream has more fat so logically it would be better

RESEARCH Spangler, Steve. Naked Eggs and Flying

Potatoes. Austin: Greenleaf, 2010. Parents (They answered some questions.)