Purpose: Which fruit will produce the most electric voltage?

Hyp0thesis: When I attach a galvanized nail and a copper strip to a _______, the greatest voltage will be produced.

Materials: Fruit, Voltmeter, 2 wires, 2 different metals (Copper / zinc), knife

Procedure:

1. Cut the piece of fruit
2. Put in 2 pieces of metal
3. Attach to the voltmeter using wires
4. record the results
5. compare results from several pieces of fruit

WHY? The _____ will produce the greatest voltage because _______

Results:

apple – .4 volts

potato – .6 volts

Conclusion:

What is causing electrons to flow?

The fruit is an electrolyte solution allowing the electrons on the metal to flow.

Independent variable – type of fruit

Dependent variable – voltage