Coin Power

Have you ever taken a bit of aluminum foil?  If you have a tooth with a filling, you would look similar to this woman:

What is going on in your mouth that feels so bad?  We will find out in this exploration. Coins are stacked together in a certain order and tested like a battery.

Materials Required

• Sandpaper

• Post 1982 pennies

• Tagboard  (In this experiment they use tagboard, but you can cut several pieces of paper towel that work just as well)

• Salt water and  vinegar

• Light Emitting Diode.  ( These can be purchased or found in many discarded electronic devices such as old yard lights or flashlights.  You may send an inquiry to mjaeger@eou.edu and receive an LED if you choose)

An excellent way to do this exploration is provided here: