what fruit has the most energy, and how much.

what fruit has the most energy, how much, and how can we display it.
Gabe Czerwony Marcus Roberts
Grade 5


No video provided


Our hypothesis is that fruits well be able to power a basic circuit, and the more sour the fruit the greater energy source.

if a fruit has a signifacent diffrence from the others

then we will find out why it has so much more energy

because we could find somthing really cool on why it has so much voltage.


how do fruits have energy in them, what is copper, what is zinc, what is a voltmeter, how energy flows through wires.


dependent: voltmeter

independent: fruit (lemon, orange, apple, grapefruit, and tomato)

controlled: wire


1. cut fruits in half and insert copper and zinc

2. use voltmeter on the copper and zinc to find out how much voltage the fruit has

3. record our observatoins in a google sheet

4. transfer our information we gathered to the cysf website


orange: size does not effect the power because its the acitidy that makes the bigger difference                                              march, 8 2021

lemon: roll the lemon to get more energy out of them                                                                                                                   march, 8 2021

apple: it makes it easier the hard the fruit because it well hold the copper, zinc in better                                                            march, 8 2021

grapefruit:  it does not mader where you put the probs on the electods they will get the same reading                                      march, 8 2021

tamato: no observation                                                                                                                                                                 march, 8 2021


during our experiment we found out that the size of the fruit does not matter and the thing that makes a difference in the amount of voltage it has is the acidity. also we found out that we can just guess the amount of voltage by finding an average for that fruit. in our experiment we did three tests for how much voltage on each fruit. we did three different fruit for the tests so we new that the fruit didn't stand out from the others. so in total we did 45 tests.


It was suprising when we saw the resultes because we thought it was going to be the lemon with the most energy

hight for apple: 975 

low for apple: 919

average for apple: 933

hight for lemon: 889

low for lemon: 800

average for lemon: 871

hight for tomato: 865

low for tomato: 845

average for tomato: 865

hight for grapefruit: 847

low for grapefruit: 847

average for grapefruit: 769

hight for ogrange: 901

low for orange: 858

average for orange: 901

so the fruit with the most energy was an apple. and the fruit with the least energy was a grapefruit


you could use it to power a circut well you run to the store to buy a new battery. you could even only use them for small things because after you do this to a fruit it will mostly taste the same.

this could be aplied to so many basic circiuts though. 



Sources Of Error

when we were doing the project we ran into trouble when we cut the fruits in half because when we inserted the copper and zinc the electrodes moved around a lot. we also tested how long the fruits last but it goes out with out keeping track of the time so you have to go with what it was the last time you saw it so we stoped doing that and also we needed three test for every fruit and they were taking around 30min which would of taken forever because we did 45 tests.


We used a video (https://courses.lumenlearning.com/boundless-physics/chapter/voltmeters-and-ammeters/) to help us understand the basics of how a voltmeter works. we also used a video (https://www.youtube.com/watch?v=GhbuhT1GDpI) to help us with knowing how to build the circuit.


thank you to Gabes mom (Rachel Czerwony) for helping us with our infograph that has all of our information that we gathered. Thank you to Gabes dad (Pawel Czerwony) for buying the materials we needed. And thank you to Marcus's mom (Roze Balez) for helping us with our spelling and the words we used.


No Log Book Provided