Can you overfill a glass with water and not spill any? "Surface tension" keeps water molecules sticking together. How does soap or salt change that? Count water drops you drip on a penny without spilling, report results online and compare them to other drop-drippers.
Related Activites from How To Smile
Try out the related activities listed below from 24/7 Science and other sources. Be sure to visit Howtosmile.org to find even more science and math activities on the web!