states that the amount of gas dissolved in a liquid is proportional
to the amount of pressure put on a liquid. Bottles at
a deeper depth had fewer bubbles and bottles at a shallower depth have
more bubbles. Our experiment proves that the deeper a diver is, the
greater the amount of nitrogen is dissolved into his/her bloodstream,
a diver is under a great amount of pressure, the greater the amount
of nitrogen is dissolved into his/her bloodstream.
For our experiment, we wanted to answer the question, “How does water pressure
affect the amount of gas (or bubbles) in club soda?” Our answer is that
the deeper a club soda bottle is underwater, the smaller the number of bubbles.
Originally, we were going to run three trials for each depth. But,
when we were done with the three trials, we had three leftover
bottles which we used
one more trial for each depth. The more trails you do, the more accurate
your results will be.
If you look at our results page, you will see that the time for the
bubbles at 5 feet is 3.2 seconds, 10 feet is 2.7 and at 15 feet
it is 2.2 seconds.
the times decrease at each deeper depth, more gasses were absorbed at each
deeper depth. The gas is represented by the bubbles coming out of the bottle,
the bottle is deeper underwater, the greater the amount of bubbles are
dissolved. There are LESS bubbles at DEEPER depths.
Although the percentage of error is fairly small at 10 and 15 feet,
at 5 feet it exceeds 10%, which is not very good, and it requires
see what the sources of error may be. Our first trials were all done
no matter how much Rex and Lizzie prepared, they still had to get used
to doing the experiment underwater. It was difficult for Lizzie to see
when Rex would open the bottle because it was very dark underwater by
and it was nearly impossible to communicate underwater. This source of
error partially contributed to the error at the other depths.
There were ways that we could have corrected the error in our experiment.
Instead of doing all of our trial runs above water, we should have
run them underwater
as well to get used to conducting our experiment underwater. This would
have decreased most of the error in our first four trials for the depth
of 5 feet.
It may have also decreased the error at the other depths.
We figured out our conclusion and where our error came from, so now
we must relate our experiment to the bends. The club soda bottle
of the soda
it represented the diver. The bubbles in the bottle represented nitrogen.
If there were less bubbles, it meant that more bubbles were dissolved
into the “diver.” Dissolved
nitrogen in the bloodstream is what causes the bends. Since we discovered that
there were fewer bubbles at deeper depths we came to the conclusion that the
deeper a diver goes, there is a greater likelihood that the diver will get the
Of course, there are other factors that contribute to causing the
bends. If a diver is down at a fairly shallow depth of say, 30
may still get
bends if they are down there for too long. Also, if they come up
too quickly or do not take a safety stop at 15 feet they are likely
get the bends.