How Many Drops of Water Fit on a Penny?

by Stephanie Truscott

Mrs. Truscott's sixth-grade class has been learning about the scientific method this week. We did an experiment where we measured how many drops of water fit on a penny to observe the surface tension of the water, and how the molecules stick together. Some groups got up to 30 drops! Next, we soaked the pennies in soap, and saw that we couldn't fit nearly as many drops because the surface of the penny became slippery. It was so fun to see their curiosity and excitement!