Fruit Battery

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The Fruit Battery

March 19, 2007
7th grade

Abstract
My objective was to determine which fruit would make the battery for a clock.

Procedure
1.

Gather all things needed for experiment.

2.

Wash hands for safety.

3.

Take the clock module and place fruit in the two holders.

4.

Remove plastic coatings at the end of all wires with scissors.

5.

Take the black cable and tie one end to the Zinc metal contact.

6.
Take the blue cable and tie one end to the Zinc metal contact and the other end of the Copper metal contact.
7.

Take the red cable and tie one end to the Copper metal contact.

8.

Insert the metal contacts to the fruit.

9.

Attach the black and red cable to the spring contacts.

10. Watch fruit generate energy to power the clock.
11. Adjust the time on the clock.
12. Set the date.
13. Set the month.
14. Set the day of the week.
15. Set the stopwatch.

Results
According to my experiments, the tomato was the best battery for a clock. The tomato has been used for a week and is still going. The tomato has the most acid. The lemon did not work at all. The apple lasted 1 day. The orange lasted 3 days.

Conclusion
My hypothesis was that the lemon and the orange will produce electricity for the longest period of time. The tests went well. The only problem that was encountered was the lemons not working.

Table of Contents

Section

Page

Question, Purpose, and Hypothesis…………………………..1 Review of Literature……………………………….................2 Materials and Procedures……………………………….........3 Results………………………………..................................4 Conclusions………………………………............................5 Acknowledgments………………………………....................6 Bibliography………………………………............................7

Question, Purpose, and Hypothesis

Question
Which fruit can produce electricity for the longest period of time?

Purpose
The purpose of my experiment is to determine which fruit can produce electricity to operate a clock.

Hypothesis
My hypothesis is that the lemon and the orange will produce electricity for the longest period of time.

1

Review of Literature
A voltaic battery is a battery consisting of a number of Primary cells with two or more unlike electrodes. Batteries produce electricity when two or more Primary or Secondary battery cells convert chemical energy to electrical energy. Fruit can be used as batteries. The acid in fruit reacts with water to create hydrogen. The hydrogen is in the forms of ions. Ions are positively charged atoms that are missing electrons. This enables the acid to take electrons from a metal, so an electrical charge or voltage is built up. The fruit with the highest amount of acid will generate the highest voltage.

2

Materials and Procedures
Materials
1.

one potato clock kit

2.

2 of each ( lemon, tomato, apple, and orange)

3.

paper

4.

pencil

5.

stopwatch

Procedures
1.

Gather all things needed for experiment.

2.

Wash hands for safety.

3.

Take the clock module and place fruit in the two holders.

4.

Remove plastic coatings at the end of all wires with scissors.

5.

Take the black cable and tie one end to the Zinc metal contact.

6.
Take the blue cable and tie one end to the Zinc metal contact and the other end of the Copper metal contact.
7.

Take the red cable and tie one end to the Copper metal contact.

8.

Insert the metal contacts to the fruit.

9.

Attach the black and red cable to the spring contacts.

10. Watch fruit generate energy to power the clock.
11. Adjust the time on the clock.
12. Set the date.
13. Set the month.
14. Set the day of the week.
15. Set the stopwatch.

3

Results

Fruit

Trial 1

Trial 2

Trial 3

Trial 4

Lemon

Did not work

Did not work

Did not work

Did not work

Tomato

7 hours 26 min.

10 hours 38
min.

13 hours 25
min.

Still going on

Apple

3 hours 43 min....
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