So, the freshmen class did something amazingly fun with Mr. Langdon! Mr. Langdon then took a film canister, back from the olden days..., and filled it with water, not a lot of water, but a fairly small amount. He then took an alka seltzer, general ones you can buy at Meijer, and dropped it into the water. After that he put the cap on the film canister, and flipped it over so that the lid was facing down. As we all watched the film canister shot up into the air and fell back down. He then explained to us how it happened. Then we got into groups and went outside to do it ourselves!
The first time we did it we filled it 1/4 of the way with water, and repeated what Mr. Langdon did. That one shot up the farthest. After that, we filled the canister 1/3 way with water and put the alka seltzer in. That one didn't really go high. so then we filled the canister 1/2 way full... that one barely left the ground! We then filled it 3/4 way full. That one barely shot the cap off. For the last one we filled the canister up all the way with water and saw what happened... barely anything.
So we figured out the more water you have in the film canister, the less room there is for the carbon dioxide to build up, which is true. This experiment was a fun one, and I hope we do more labs soon! The only bad part about them is when we have to write lab reports.
- Matthew Tripp, Freshman
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