Materials:
·Matches
·Birthday candle
·Small stopper with single hole
·8 1/2 stopper with no holes
·8 1/2 stopper with one hole
·Regular air
·Nitrox- 60 percent nitrogen, 40 percent oxygen
·Nitrox- 50 percent nitrogen, 50 percent oxygen
·Pressure sensor
·Computer- Data Studio
·Balloons

 

Method:

Regular Air:
First, we lit a match and lit the birthday candle which was inserted into the small one-holed stopper. Then, we pressed "start" to begin graphing the results on the computer. Then, we carefully yet quickly dropped the candle into the flask. As quickly as possible, we stuffed the stopper with the pressure sensor attached into the mouth of the flask. When all of the oxygen was used up, the flame was extinguished and the pressure dropped. When it looked as if the pressure had definitely stopped dropping, we pressed "stop." We repeated this process two more times.

Nitrox:
Liz held the empty flask upside down. Ali cut open a balloon containing the type of nitrox being tested at the time. Ali then held the balloon with the opening directly under the flask. Slowly, she opened her thumb and finger, allowing nitrox to blow into the flask. When about half of the nitrox in the balloon had been blown into the flask, Liz put the temporary stopper on the flask. Ali retied the balloon. We took the flask over to Mr. Harlan's desk. Ali lit the match and candle. Then, we pressed "start" to begin graphing. As Liz removed the stopper, Ali placed the lit candle into the flask and stuffed the stopper with the pressure sensor attached onto the flask. When all of the oxygen was used up, the flame was extinguished and the pressure dropped. When we were sure the pressure was finished dropping, we pressed "stop." We performed this process three times for each mixture of nitrox.

This is a picture of the flask, candle, and the stopper

with the pressure sensor in it

This is us filling the flask with nitrox

This is a picture of Ali watching as the flame is extinguished

 

  HOME

Background Information

 Lab Report

Method & Materials

 Hypothesis

Results and Conclusion

Analytic Essay

 Photos

  Diagram

   Animations

 Bibliography

 Thank You

 St. Matt's Deep Site