Sample Science Project

Name of Project: Lemons vs Potatoes

Which produces more volts, lemons or potatoes?

If I measure the volts from lemons and potatoes, the lemon will give off more volts because the lemon is a citrus fruit.

Independent: Fruit or vegetable
Controlled: setup for lemons and potatoes
Dependent: voltage from lemons and potatoes

Materials and Tools:

three lemons, three potatoes, sharp knife, copper and silver coins, six lengths of electrical wire (insulation stripped from the ends.), voltmeter.


1. to help the current flow roll the lemons on the table one by one to release the juices.
2. ask an adult to make two slits in the lemons, each one should be the size of the coins.
3. push a copper coin and a silver coin into the slits you made. make sure the coin are touching the fruits flesh.
4. use alligator clips and two wires to connect the three lemons (each wire should run between a silver and copper coin.)
5. connect the last copper coin and the last silver coin to the voltmeter.

Electricity is a form of energy. Electricity is made of atoms. All atoms have a nucleus that give off charged particles called protons and uncharged particles call neutrons. The nucleus is surrounded by electrons which are negative. Usually the number of protons is equal to the number of electrons when another nucleus Comes by it takes one electron or gain electrons and the cycle keeps going.
What is an electrolyte?
Electrolytes are any atom that contains free ions that make the substance electrically conductive. Most electrolytes are made usually when salt is placed in a solvent such as water .
by Tanner

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. chemical reactions encompass changes that strictly involve the motion of electrons in the breaking and forming of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles as well as nuclear reactions. Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous. They follow the silver coin creating a electrical reaction, heat In are experiment the chemical reaction was non-input of some type of energy, such as light, heat or electricity.

In our experiment the chemical reaction was non- spontaneous, the type of energy was electrical. the fluids in the fruit and vegetable reacted to the copper and silver coin creating a electrical reaction.
by Nathan

Results: The lemons produced almost three times as much voltage than the potatoes. The potatoes highest voltage was 0.303 the lemons highest voltages was 0.830

Our hypothesis was right because the lemons produced almost three times more volts than the potatoes. The light bulb did not light up because the lemons and potatoes did not give off enough volts