Materials Required:
l Copper nail
l Zinc nail
l Steel wool
l Lemon
Procedure:
- Scrub a copper nail and a zinc nail with a piece of steel wool until they are clean and shiny. Rinse the nails under the faucet.
- Now poke the pointed ends of the nails into the center of a fresh lemon. Space the nails about 1 inch apart and leave ½ of each nail protruding.
- Stick out your tongue and touch it across the tops of the nails. You will feel a tingle.
This Is What Happens:
You have just made a chemical battery and the tingle on your tongue was electricity. The lemon contains acid and water, which reacts with the metals copper and zinc to produce a slight current that passes over your tongue.
