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Middle School

Matter and Energy in Organisms and Ecosystems

Yeast and Sugar

Lesson Description:

Have you ever heard of the word yeast? You may have heard that it is an ingredient in many baked foods like bread. Yeast is a single-celled organism that eats sugars to grow. When yeast eats sugar, it produces carbon dioxide which, in turn, makes bubbles.

In this lab, you will be measuring just how fast yeast eats sugars in some ordinary soft drinks. How will you do this? You will do this by measuring the amount of carbon dioxide produced.