Need Batteries? Use Fruits!
Science Fair Project
Hypothesis
I think that citrus fruits will have more volts because the juice inside citrus fruits will flow easier.
Materials
Fruits and veggies:
lemon
apple
orange
carrot
banana
potato
grapefruit
pomegranate
onion
tangerine
2 in. galvanized nail
2 in. copper nail
voltmeter
Independent Variable
The fruits and veggies.
Dependent Variable
How many volts the fruits and veggies give.
Controlled Variable
The temperature.
Procedure
1. Prepare your fruit or veggie for the experiment by squeezing on all sides with your hands.
2. Insert your nails into the fruit or veggie, approximately 2 in. apart. The ends of the nails should be in the fruit, not touching.
3. Connect the "+" wire of the voltmeter to the galvanized nail and the "-" wire of the voltmeter to the copper nail.
4. Record the results.
5. Repeat with each fruit and veggie.
Questions I Would Like To Answer
1. What would make a better battery? A lemon, a potato, or an apple?
2. Where did I get my materials?
3. What did I learn?
Resources
Reaserch Notes
I can't use hard shells fruits because the nail will break it.
Results
Conclusion
My hypothesis was half right because the oranges and the lemons had the most volts but the tangerine and grapefruit were on the bottom half.