Buoyancy Lab: Aluminum Foil Boat and Pennies

Have each student dip one penny half way into the liquid and hold for 20 seconds. Remove penny and observe what happened. Place the remaining pennies in the solution and watch the reaction. Once shiny, remove the pennies with the spoon and put into the tub of water to rinse. Further experiments: Use other types of coins as well. Total time: 15 mins ................
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