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Yeast Experiment: Fermentation #1 – Ingredients

QUESTION

WHEN FLOUR, SUGAR, WATER AND YEAST ARE MIXED TOGETHER, WHAT IS THE RESULT?

MATERIALS

  • 2 empty, clean 1-litre soda bottles
  • 2 latex balloons
  • 2 rubber bands
  • Glass measuring cup, 1-cup capacity
  • Measuring spoon: teaspoon
  • Measuring spoon: tablespoon
  • All-purpose flour
  • Granulated sugar
  • Water, room temperature
  • 2 packets of Active Dry Yeast (each packet is ¼-ounce or 2¼ teaspoons)

PROCEDURE

  1. Fill each soda bottle with one packet of yeast, 1 teaspoon sugar and 1 cup of room temperature water. Mix together.
  2. In one soda bottle, add 2 tablespoons all-purpose flour. Mix together.
  3. Secure a balloon on top of each soda bottle with a rubber band.
  4. Record and time what happens to the balloon.

OBSERVATIONS & CONCLUSION

1. What happens to the balloons?
2. What is the difference between the two bottles?
3. Does it make a difference in the length of time the fermentation worked between the two bottles, and why?

Review & Comments

Amanda | Reply

Hi! We tried this fermentation experiment today – one bottle with flour and one without. We thought that the one with flour would ferment quicker, however our bottle without flour actually filled the balloon up first. Can you tell us why?

Red Star Yeast | Reply

Hi Amanda – Thank you for your inquiry. Please contact us directly here: https://redstaryeast.com/contact-us/.

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