Fermentation in a Bag
This is one of our most popular and adaptable activities for use in outreach events and classrooms. It is a basic experiment that allows students to observe the process of fermentation and the challenge of producing ethanol from cellulosic sources. Students combine yeast and warm water with a feedstock in a “snack” size resealable zipper bag and observe as the yeast “eats” the feedstock such as sugar, cornmeal, or sawdust, and produces carbon dioxide and ethanol. Younger students can observe fermentation in a single bag, while older students can create multiple set-ups to compare how yeast reacts with different feedstocks.
|Audience||Elementary through High School (K-12)|
|Related Subject Areas||Biology, Agriculture, Environmental Science|
|Time Required||30-60 minutes prep time, depending on event/group size. 10 minute set-up, observe for 15 minutes or up to 1.5 hours.|
Warm water, Dry Active Yeast, Yeast feedstocks (i.e. Sugar, Cornmeal, Corn Stover Powder, Sawdust, and/or other options of your choice), Small Graduated Cylinders (100mL), Measuring Spoons, Resealable zipper bags (“snack” size)
|Tags/Keywords||elementary school, middle school, high school, fermentation, microbe, ethanol, carbon dioxide, interactive|
Fermentation In A Bag Package (.zip, 5.1MB)