Let’s round-up experiments and science articles about money. The Captivating Chemistry of Coins has an article and three hands-on experiments, such as cleaning pennies. Scientific American has the same experiment—with more detail. Flinn has The Science Behind Pennies. Try to see how many Water Drops on a Penny. Can you load 50 drops? If you have yen, they float in water. Measure Reaction time by dropping a dollar or a ruler. Have you wondered how Counterfeit Pens Work? Are Counterfeit Pens Reliable? Here are several articles from the U.S. Currency Education Program. Do you have a big jar of pennies? Sort out pennies older than 1982 and do this Density Lab. Flinn has this lab, Biological Currency, to test newer one dollar bills. Look at currency under the microscope. We use a digital microscope with a USB adapter and a laptop or Chromebook to examine currency. It’s fun to look at foreign currency, too. It’s fun to look for security features in the one dollar and five dollar bills.
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