Six Ways to Clean a Penny: A Simple Science Experiment - 2 views
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Jessica Steinmetz on 27 Feb 14Most of us probably remember the classic science experiment of cleaning a penny with a mixture of vinegar and salt. This website demonstrates stepping that up a notch and experimenting cleaning a penny with different types of substances. This activity allows for the students to make inferences and predictions on what liquid will make the penny cleaner or shinier and what liquid or substance will make it duller.