Today we explored how we could change pennies. With a little research we discovered that pennies are made of copper (and so is the Statue of Liberty!). BUT after 1983, pennies were made with copper and zinc. We decided to search for pennies made before 1983 for our experiment. First we sprinkled them with salt and then dropped a few drops of vinegar on them. Within 30 seconds you could see the chemical change happening. The dirty, dull pennies became shiny again!
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