Prediction

The lemon will create the strongest electrical charge when we use it as a battery.  I think it will do this because it contains the most citric acid.

Results: 1 lemon: 0.6 volts        2 lemons: 0.9 volts

1 potato: 0.3 volts

1 orange: 0.2 volts

Observations:  1) if you put the wire on the wrong thing on the voltage meter, it goes negative.

2) The copper and zinc got wet and with the fruit/vegetable juice

3) Our group worked efficiently and quickly.

Today in class, we used a fruit to try to power a light bulb.  I think that the fruit has elements in it that are conductors and that is why we are able to push electrons and make them flow thru the wires.  Nobody was able  to get the light bulb to work because it needs 2 volts to get it powered and the fruit/vegetable does not have enough power to light the bulb ( hence why this cannot be used as an alternative to other power sources).  We would need a lot fruit just to power a light bulb so this is not a very effective power source.