Comments: 1
Question and Hypothesis
My question was does a bigger panel solar powered cooker work better than a smaller panel solar powered cooker?
My hypothesis was that the bigger panel cooker would work better than the smaller one.
My hypothesis was that the bigger panel cooker would work better than the smaller one.
Procedures
1. First, we did resurch on solar powered cookers
2. Next, we built our own solar powered cookers
3. Then, we put our cookers in the shade for 10 minutes to get a base line temperature
4. Finally, we put our cookers in the sun for 10 minutes, checking them every 2 minutes
Results2. Next, we built our own solar powered cookers
3. Then, we put our cookers in the shade for 10 minutes to get a base line temperature
4. Finally, we put our cookers in the sun for 10 minutes, checking them every 2 minutes
Conclusion
My hypothesis was incorrect. I thought that that the bigger cooker would work better than the smaller cooker. But the smaller cooker worked better than the bigger cooker. This probably happened because, in a larger cooker, the sun's energy has more places to spread out, unlike the smaller cooker. In the smaller cooker, there is not much room to spread out, so the energy has no choice, but to go into the collector. So by the time the energy gets to the collector in the bottle of the bigger cooker, the energy has already evaporated, so not all of the energy makes it into the bottle.
DiscussionI think that the use of solar energy reduces enviormental pollution because when coal is burned, it gives off carbon dioxid and emissions such as sulfur and nitrogen oxide. Thoes things can pollute the air and water. The use of solar energy does not give off thoes emissions, there for polluting the Earth. Solar energy only needs the sun to work, so solar energy is already there, but just not captured. That is why I think that solar energy reduces enviormental pollution.
You need to log in to Grade 5 in order to comment on this entry.
Back to entries
jtubbs
on April 28, 2006 at 12:28 PM
Julia,Excellent project! You are a budding scientist. You did a wonderful job following the scientific method.
Question - 3/3 - Your question is testable and your hypothesis is written correctly.
Procedures - 3/3 - Logical and easy-to-follow, but you left out comparing your results with another student's.
Results - 3/3 - Your graph contains all required items.
Conclusion - 3/3 - Your conclusion is based on your results and is well written.
Discussion - 1/3 - You left out two parts: why did you have to compare your data with another student's? write an observation and an inference.
Total - 13/15
