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Transcript of Electric Fruit
1. Squeeze a whole unpeeled lemon a few times to tenderize the inside and make it more juicy.
2. Push copper and zinc strips half way through the lemon and make sure they don't touch.
3. Clip the end of the cable to the copper strip sticking out of the lemon, and clip an end of another cable to the zinc strip sticking out of the lemon.
4. Look at the voltmeter and record the positive and negative battery contact points. The positive is (+) and the negative is (-).
5. Now hold both cables attached to the - and + contact points and hold the end of the cable attached to the strip of copper to the + battery contact point, and hold the end of the cable attached to the zinc strip to the the - contact point.
6. Turn the scale dial. If the voltmeter is manufactured with one, until meter needle rises. Record the voltage amount indicated by needle; once it stops, so this is the voltage amount produced by the lemon.
7. Repeat this process with your lime and grapefruit and then compare the data.
Trial #1 Trial #2 Trial#3
CAUSE AND EFFECT
Cause: When I test the amount of acidity in the fruits
Effect: Which fruit will produce the most electricity on the voltmeter?
VARIABLES AND CONTROLS
1. The fruit; lemon, lime, and grapefruit.
Which fruit has the most acid and shows the most electricity on a voltmeter?
By Molly Fedick
If I test the acidity of four different fruits then the lime or lemon will produce the most acid and most electric power because they contain the most citric acid.
- 1 grapefruit
- 1 lime
- 1 lemon
- 3 strips of zinc
- 3 strips of copper
- 2 battery cables each with a metal clip on one end
1. Fruit, Pages. "The Fruit Pages." 1998. <http://www.thefruitpages.com/acidsweet.shtml>
2. Chavis, Jason C. "What is an Electrometer?" 2003. <http://wisegeek.com/what-is-an-electrometer.htm>
3. Thompson, Novela. "What Fruits Have Citric Acid?" October 30,2013. <http://www.livestrong.com/article/what-fruits-have-citric-acid/>
2. 3 strips of zinc
3. 3 strips of copper