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Have you ever tried the lemon battery experiment? This one has been around for a while, but it is always such a delight to see it in action! Kids just love it. I’ll show you how today. This is an awesome science project for kids, or great for any STEM project!
Science has always been more of a boy field, but more and more girls are becoming increasingly interested in science. Did you know that only 1 in 1,000 girls pursue a STEM career? Hopefully we can soon change that!
My daughter loves learning about all kinds of science fields from nature to electricity to coding, but I would say leans more toward artistic careers for the future. However, I love doing science experiments with her to help her see how great science can be. This lemon battery is a great one to start with if you have kids expressing an interest in STEM projects.
STEM, if you are not familiar stands for Science, Technology, Engineering, and Math. We received a free STEM themed box teaching us how to create this project, but it is easy to recreate on your own!
Supplies to Make a Lemon Battery:
Try also this fruit powered clock!
How to Make a Lemon Battery:
Roll the lemons on a hard surface to break apart the juice pockets.
In each of the 4 lemons place a nail on one side and piece of copper wire on the other side.
Connect the nail on one lemon to the copper wire on the next lemon. Connect them all in a circle except for the first and last ones.
On these last two, connect one alligator clip to a nail and to part of the light and the other to a copper wire and to the other part of the light. This will light up the light!!
How Does the Lemon Battery Work?
The lemon battery has two different metals: copper wire (you could also do it with a penny) and a galvanized (or zinc coated) nail. The lemon has citric acid in the juice. The zinc and copper are the electrodes and the lemon juice is the electrolyte. A chemical reaction happens that is called oxidation-reduction, where there is a transfer of electrons. The zinc is oxidized inside the lemon, some of its electrons are transferred to the copper to reach a lower energy state. The energy released creates the power, lighting up the bulb. The wires allow this transfer of energy.
Check out some more of our cool STEM project ideas.