Currents from the kitchen

Current Electricity

Hypothesis

The strawberries will generate the most amount of voltage because they are acidic.

More acidic fruit= more hydrogen ions = more charge carriers.

Observations

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Our dependent variable was the voltage, how much voltage the fruit will produce.

Our independent variable was the fruits, where we used apples, kiwis, grapes, strawberries.

Our controlled variables were same size, and weight, same type of nails and wires, the environment

After we checked the final results, we saw that the kiwi produced the most amount of voltage, and I was really impressed by this. We then saw that the strawberries gave a negative number, but it was because every time you change the wires, the signs do. We then forgot that we didn’t had the same size for each fruit, what might have done some changes to the results. Because the fruits didn’t had the necessary energy to make the bulb light up, we weren’t able to make the bulb light up, to find out if electrons were flowing we just checked the voltage meter. Also, to make this work we had to do a series circuit. We think that to improve the experiment we should use the same size and weight for the fruits. We could use this for our everyday life, how? Well, you can make an emergency battery, just make sure you have a lot of fruits to do it.

Conclusion

The kiwi created the most amount of voltage. We didn’t tried the lemon, but I wish we could because it seemed to be the best in the class.

This is how it works

I did some research about the topic, and the fruits batteries work because the acid in the fruit acts as the electrolyte but the energy itself comes from the difference in potential between the two electrodes. The Zinc is oxidized inside the fruit|vegetable, exchanging some of its electrons in order to reach a lower state, releasing electrons which pair up with the hydrogens ions to form hydrogen gas. The electrons will then flow through the wires towards the copper plate, giving it a small negative charge, which in turn, attracts the positively charged hydrogen ions. The most noticeable effect is that the hydrogen bubbles will be produced around the copper rather than around the zinc, which tends to be saturated with positively charged zinc ions. The lemon merely provides an environment where this can happen, but they are not used up in this process.

I got some information from this sites

https://van.physics.illinois.edu/qa/listing.php?id=43600&t=current-from-battery

https://www.reference.com/science/fruit-conduct-electricity-debd1102edcaa360

 

 

SSEP Reflection

SSEP REFLECTION
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Define: In our groups, we wanted to know what would be the effect of bacteria in microgravity, and if it would be the same as the one on earth.
Discover
We did some research to some groups that have participated before in the SSEP, then we did a review of them and got some new ideas, we learned about how the process would go, and what we had to do.
Dream
Then we did some brainstorms in our groups to know what biological, chemical or physical system we would like to explore with gravity seemly turned off for a period of time, as a means of assessing the role of gravity in that system. We thought that bacteria would be a great system to explore and learn.
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Design and Deliver
We searched through a lot of websites to know more about the topic and to learn more about bacteria, we also tried to contact a specialist in bacteria, but we couldn’t contact him, so we did some experiments with bacteria from the sink, the phone, the table and the floor. Then we wrote our proposal to submit to the SSEP committee.
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Debrief
We think that maybe we could have used more time to do the proposal and examine what we wrote. And maybe we could have done contact with previous groups that have participated in the SSEP before.

Electricity Mind Map

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Questions:

1. Are we going to have enough power to meet our future needs?

2.Why isn’t electricity considered a primary energy source?

3. How do you remove static electricity?

4. What is a battery and who invented it? Why?

5.How many types of electricity are in total?

6. When we turn off lights, etc. is electricity still working?

7. What’s the difference between a parallel and series circuits?