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Lemon battery

Luis Daniel Hormiga González

7B

4 terms

Diego Melo

C.B.I
2011- 7- 11
Purpose
I do this experiment because it is very interesting and is very easy to do because it isusing household materials. That’s why I did the lemon battery to present it the day of the science fair.

Awards
I thanks to my father because he help me in my experiment and he teach me how to makea lemon battery and he explain me why the lemon works and how to turn on a digital clock with the help of a lemon. My brother helps me too and he helps me to make the lemon battery

Problem
Ifthe lemon decays, the digital clock will continue working? To prove this the experiment must be realized and then see if the digital clock continue working.

Investigation
A lemon battery is adevice used in experiments proposed in many science textbooks around the world. It is made by inserting two different metallic objects, for example a galvanized nail and a copper coin, into a lemon. Thecopper coin serves as the positive electrode or cathode and the galvanized nail as the electron-producing negative electrode or anode. These two objects work as electrodes, causing an electrochemicalreaction which generates a small potential difference.

Hypothesis
The lemon decays and the digital clock didn’t work; I proved that the lemon can’t give energy to the digital clock if the lemondecays.

Experiment
Materials
* 4 tweezers crocodile
* 1 large wire
* 2 coins of 2 cents of euro
* 1 lemon
* 2 screws
* 1 knife
* 1 digital clock without battery

Process1. Cut the lemon in two parts
2. Make two hole in order to put the coin in one part and the screw in the other
3. Connect the tweezers with the coin and the other tweezers to the screw4. Connect the tweezers with wire to the digital clock
Decay dates
In my experiment the problem is that the digital clock needs more than one lemon to work because the lemon doesn’t have good...
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