Wet Lab

 Our Lab taught us about Boyle's Law and how to make a good experiment. The results showed that, while we descended, the volume of the air bubble shrunk. This shows that our experiment did verify the concept of Boyle's Law, but didn't match the formula of Boyle's Law.

Our Wet Lab fulfilled the main concept of Boyle's Law, but it was very inaccurate in comparison to the actual formula. The problems we had involved stability and measurement. Out biggest problem was the fact that we had to make our own measurement device for the pool. Since the pool we went in did not allow glass, we cut a one gallon plastic arrowhead bottle in half, then made our own measurements on it. This proved to be inaccurate. This made our results more inaccurate as we measured every 2 feet. Water leaded into the cylinder we had created because we could not hold it completely stable. A minor problem was that we had to saw a 20ft pole into quarters. Then we had to tape them together, which made it flexible. This caused it to be a little flimsy. But we think it didn't change our results enough to make it inaccurate. Overall, our results showed the concept of Boyle's Law, it just wasn't very accurate.

Our Results showed that for every 2 feet we went down, the volume decreased by.5 cups. This is very inaccurate, because these results are do not show the results of an inverse variation, as in Boyle's Law. However, it did show that as you go down underwater, the volume of air decreases.

Our results show how scuba diving can be very dangerous to your lungs. It shows that you must not hold your breath under water, because as you go up, the pressurized air could expand and explode your lungs. This is the concept of Boyle's Law.

If we were to design our experiment again, we would change two things. First of all, we would change the design of how we measured everything. We would make it so that there was a straight rod with measurements on it, and a slider, so we could attach the measuring device and slide it down, for more accurate measurements. It would also not allow any more air to get into the measurement device. Our other problem was that we didn't have enough time to do our experiment more than once. This hindered us from getting more accurate results.

Our lab went very well for our first time. It didn't break and cause any problems, and we got our results. We did not get close at all to Boyle's Law, but we got the main concept. This is why we think our experiment went well.


 

Dry Lab

 Our Lab went very well in our opinion. We learned many things, found new information proving our wet lab wrong, and proved Boyle's Law.


The results from our Dry Lab were correct. They matched Boyle's results and our hypothesis (using Boyle's Law), proving that the lab worked and gave accurate results. We also had time to do the experiment three times, instead of only once, further eliminating error. We think that our Dry Lab was a perfect example of Boyle's Law in action, proving all aspects of the law.


Our Dry Lab was one that had room for a great amount of error. The good news was that our experiment was almost errorless. One minor error was that we estimated the pounds per square inch on the pump. For example, if we were going for 14.7 pounds per square inch on the pump, it would not be 14.7 PSI exactly, but very close. The only other thing close to error was that we measured the length of the bubble using our eyes. There was not any other way to measure it, however, so our results were very close to being accurate, but not exactly accurate. Other than these two minor details, everything worked as planned, and the bottle did not explode.


Our results showed material very important to scuba diving. Our results showed that going under water 33 ft (one atmosphere of pressure) created the greatest amount of pressure change. It showed that it is dangerous to hold your breath, even if you only go down 16ft, because there is such a great amount of change in volume of air. In fact, the volume of air in your lungs decreases by half. So, if we were to take a breath of air under water and we ascended to the surface with out breathing, our lung would expand to twice its size, causing lung rupture. Boyle's Law is very important to scuba divers everywhere, and everyone should consider it when diving.


If we were to change anything in our lab, we would change three things. First of all, we would make sure the temperature in the soda bottle remained the same, The temperature involves how Charles's Law effects Boyle's Law because of how heat increases volume and coldness decreases volume. If we could keep temperature the same, then it would be even more accurate. Second of all, we would make the pressure for our pump completely accurate. This would help us get more accurate results. And last of all, we would make it so we could measure the air bubble to the exact hundredth of a ml. Making sure our measurements was exact would help us just have accurate results.


 Background Essay

 Lab Report

Analytic Essay

Display of Results

Diagram

Photograph

Links

Animations

Enhancements

Bibliography

St. Matt's Deep Page

Index