Find out what is happening here: http://www.stevespanglerscience.com/lab/experiments/colorful-coins
If you’ve ever needed to clean a coin like a nickel or a dime, you might have used vinegar. That’s a perfect combination, unless you forget to dry the vinegar off of the coin! With the Colorful Coins activity, you’ll see how there is more to a shiny nickel or dime that initially meets the eyes.
Want more experiments like this? Check out http://www.stevespanglerscience.com/product/naked-eggs-and-flying-potatoes
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