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Monday, April 17, 2006

Solar cooker.





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Question and Hypothesis
 
My question was, does the size of the solar cooker affect the greater of the tmperature?
My hypothesis was,  that I thought that the greater the size of the solar cooker the greater the temperature will increase.

Scientific Procedures

1. I looked up information on the internet about solar energy and solar cookers and got a plan for my solar cooker.

2. I got the supplies and built my solar cooker.

3. I came up with a question and hypothesis.

4. I tested my solar cooker. I sat my cooker in a shadey area for 5 minutes. At the end of the 5 minutes I recorded the curent baseline temperature.

5. I brought the solar cooker into the sun. I recorded the temperature of my solar cooker every 2 minutes untill 10 minutes.

6. I did not make any adjustments to my cooker.

7. Back to my question I had to test my solar cooker compared to a bigger solar cooker.

Results



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Conclusions

To what I have observed the bigger the colar cooker the greater  the temperature. My hypothesis was correct. When I compared a big cooker to a smaller cooker the bigger one exceeded the temperature of the smaller cooker. I think that the bigger cooker the greater the temperature will get because the more reflective and sun absorbent material you can but on  the cooker. The more material you can use the more the sun will be attracted to the cooker which heats the container. Looking at my chart it seems that the 2 cookers started the same but after 6 minutes they started to part. I think that is because the bigger cooker got more sunlight and trapped it better than the smaller cooker. They started the same both trapping the same amoount of heat and then the smaller cooker didn't get a lot more heat, but the bigger cooker did. The bigger cooker attracted more sunlight and reflected and absorbed it better than the smaller cooker because it is bigger and stands out more to the sun with more material.

Discussion

It is better to use a solar cooker than to burn coal for heat and to cook things because coal is a nonrenewable resource and eventually it will run out. So, by using solar energy instead of coal in as many ways as you can you can help save and be frugile when using coal. I think Mr. Tubbs had us test it twice or compare to someone elses is to make sure it is accurate. If you were to invent a drug. You can't just test it once and say it works you have to test it over and over to make sre it really works and does what it is supposed to do. If you are comparing two things you need to test both things so you can actually compare with real and up to date data. You can not just make up and number and say it is true. One observation from my test was that the base temperatures were different, they were very slight in difference though. My inference for that would be that I think the two base temperatures were different because the bigger one(had the higher base temperature) could pick up and attract the slightest amount of sun or heat.




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Posted by: meghanm
Monday, August 29, 2005

Coast and Oasis



coast~ the land near shore



Oasis~a fertile green spot in a desert

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Posted by: meghanm
Modified on September 16, 2005 at 1:27 PM