Cleaning CoinsChemical and Material Sciences
- Kaci Galigher
"In this science fair project “Cleaning Coins” I conducted an experiment to determine the best solution for cleaning tarnished or oxidized coins. I gathered six different solutions that I thought would work best to clean the coins, and put one type of coin in each different solution and let them sit 24 hours. After the 24 hours were up, I took the coins out and recorded the results."