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Yeast Beasts in Action

Experiment #24 from Middle School Science with Vernier

Education Level
Middle School


Yeasts are microorganisms. They can break hydrogen peroxide down into water and oxygen gas. In this experiment you will investigate yeast activity in acidic, neutral, and basic mixtures. You will observe yeast activity by measuring pressure caused by the oxygen gas they produce.


In this experiment, you will

  • Use a Gas Pressure Sensor to measure pressure.
  • Measure and compare yeast activity in acidic, neutral, and basic mixtures.
  • Make a conclusion about yeast activity.

Sensors and Equipment

This experiment features the following sensors and equipment. Additional equipment may be required.

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This experiment is #24 of Middle School Science with Vernier. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.

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