6th Grade · Science · Activity · shared by Luke Morgan
This 6th Grade Science activity explores fermentation and fungi, showing how microscopic organisms use sugar to make bread rise.
Activity: The Science of Fermentation Countdown
Microscopic organisms play a massive role in creating the foods we eat every day. In this activity, you will explore how fungi like yeast and mold transform simple ingredients into complex flavors through a biological process called fermentation. Read the Topic Snapshot below to discover the science behind these tiny workers, then complete the 3-2-1 Countdown tasks using the information you found.
Fermentation is a natural chemical transformation where microscopic organisms decompose sugar molecules to generate energy. Fungi are the most frequent biological agents involved in this intricate process. One particularly famous fungus is Saccharomyces cerevisiae , or common baker's yeast, which humans utilize to produce aerated bread. Another significant fungus is Penicillium roqueforti , a specialized mold variety used to develop blue cheese. These active organisms perform complex metabolism to survive, effectively altering the physical texture and flavor profile of our nutrition. During this metabolic phase, they generate specific chemical byproducts that are essential for the final product.
In the culinary art of bread making, the primary byproduct is carbon dioxide gas, which forces the dough to expand and rise. This biological process creates a wide array of different fermented foods with distinct characteristics. For example, yogurt is manufactured when specific bacteria ferment dairy milk, while sauerkraut results from fermented cabbage. Soy sauce is also traditionally produced through the extensive fermentation of soybeans and wheat. Without these tiny fungi and bacteria and their chemical byproducts, many of the savory textures and complex flavors in our favorite meals would simply not exist in our modern diet.