The hypothesis is that yeast will use grape sugar as a substrate for cellular respiration, resulting in the production of carbon dioxide and ethanol.

You will use two plastic baggies, yeast, and grapes to observe the results of cellular respiration of yeasts, using grape sugar as a substrate and yielding carbon dioxide and ethanol.

You will need two self-locking plastic baggies, one which has perforations, a heavy-duty freezer bag, 5 grams of dried bakers yeast, a pH indicator strip, and 150 g of grapes.

The experiment showed that yeast can use grape sugar as a substrate for cellular respiration, resulting in the production of carbon dioxide and ethanol. The most interesting observation was that the carbon dioxide gas produced extinguished the splint.

This science project is interesting and unique because it demonstrates the process of fermentation, which is used to make many different types of alcoholic beverages.

Experiment variations to consider include testing different temperatures to determine the best temperature for yeast enzyme activity, and allowing air to reach the juice after a few days to observe the conversion of alcohol to acetic acid due to bacterial action.

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!