What can you do with pennies? Do you have a large jar of coins? First, compare the Densities of Pennies. Sort the Pennie’s into to groups: pre-1982 and post 1982. (Here is an article about the 1982 penny. The coin changed from copper to zinc with a copper cost.). Here are the masses for the old and new pennies. Have you dropped water on to a penny?
Here is a lab from ACS; the lab reacts new pennies with vinegar and salt. You can extend a lab with iron nails and lemon juice. Here is the half-life of pennies lab. You’ll need 100 and a shoe box. Do you have a digital scale? Here is a penny statistics lab. I plan to do similar labs to teach my kids how to use Excel or Google Sheets. (Okay, my husband, Rob, will teach the kids how to use spreadsheets.). Here is Flipping Coins, another stats lab. Here are instructions for a coin battery. Most of these labs are suitable for middle school students in Physical Science. But, if you have a group of kids who haven’t tried these activities, age isn’t important. See why we save coins for lab? The coins are in a recycled yogurt container. How is that for frugal?
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