Balloon Experiment

Throughout the experiments the size of the balloons stayed about the same size except for in experiment 3. Also the bottles that had more sugar had a stronger scent of alcohol and also contained more foam on top of the liquid. All yeast in each of the bottles seemed to have fermented at the same time and stopped/slowed down, the growing process, at the same time. Bottle 3 also would always overflow and the foam would fill the ballon in every experiment. Another trend with bottle 3 was that in the test experiment and the first experiment, the balloon would make a squeaky sound that sounded like air was leaking out, because of this I made sure to roll the balloon as far down the bottle as possible. Lastly the yeast in bottle 0 always sank to the bottom but the sugar was not visible.

The hypothesis stated that the more sugar in the bottle the bigger the balloon would grow. This was almost correct except in bottle 3/bottle 3 extra where the results showed that the balloon grew less than bottle 1 and bottle 2. This was probably due to the fact that the plastic bottles being to small. This would be a problem because the less capacity the less oxygen can be stored, due to the amount of ethanol produced, and the less oxygen in the bottle the less carbon dioxide it would produce. In
The bottles were kept in the same room, with the same amount of sugar, the same amount of yeast and the same amount of water which helps the validity of the experiment. The factor that effected the validity in a bad way were that it took 20 seconds in-between each time water was poured into a bottle. This wouldn’t really effect the results to much but they still could have effected the results a tiny bit. This could have been prevented by filling a large jug with water at the right temperature and by doing this speeding up the process of pouring the water by not having to pour adjust the water temperature for each cup for every