The Lawrence Hall of Science
The public science center of the University of California, Berkeley.
Wednesday–Sunday 10:00 a.m.–5:00 p.m. Animal Discovery Zone 11:00 a.m.–4:00 p.m.
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Learners discover the bubble power of living cells in this multi-hour experiment with baker’s yeast. Learners make a living yeast/water solution in a bottle, and add table sugar to feed the yeast. As the yeast breaks down the sugar into simpler molecules, carbon dioxide is released. As the carbon dioxide bubbles up in the bottle, the gas expands a balloon that has been fitted over the bottle’s opening. Materials List:
Preparation Time: 10 - 30 minutes
Activity Time: 4 - 24 hours
Bread BubblesPDF
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