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Yeast Experiment: Fermentation #2 – Temperature

QUESTION

WHAT EFFECT DOES TEMPERATURE HAVE ON THE FERMENTATION OF YEAST?

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-ounces or 2¼ teaspoons)

PROCEDURE

  1. Fill each soda bottle with one 1/4 ounce packet of Active Dry Yeast, 1 teaspoon sugar, 2 tablespoons all-purpose flour and 1 cup of room temperature water.
  2. Set one bottle in a vessel with warm water.
  3. Set the other bottle in a vessel with ice water.
  4. Secure a balloon on top of each bottle with a rubber band.
  5. Observe and record results. Keep both containers at a constant temperature.

OBSERVATIONS & CONCLUSION

1. What effect does temperature have on the fermentation of yeast?
2. When was the difference noticeable?

Review & Comments

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