Science, Grade 6


Table Of Contents: Fermentation

1. What Is Fermentation?
Fermentation is a cellular process that breaks down sugar molecules and produces energy, without the use of oxygen.
2. Alcoholic Fermentation
Alcoholic fermentation occurs when single-celled organisms, such as yeast, break down sugar into carbon dioxide and energy.
3. What Does Yeast Do in Bread Dough?
When yeast is added to bread dough, carbon dioxide is released that causes the bread to rise.
4. Lactic Acid Fermentation
Lactic acid fermentation occurs in our muscles during heavy exercise, when oxygen levels have been depleted in our muscle cells.
5. Lactic Acid and Sore Muscles
Without oxygen, the cells use fermentation to obtain energy. Lactic acid is also produced and causes muscles to feel weak and sore.