Yeast Fermentation test # 2 - Temperature
QUESTION
WHAT EFFECT DOES TEMPERATURE HAVE ON THE FERMENTATION OF YEAST?
MATERIALS
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2 empty, clean 1-litre soda bottles
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2 latex balloons
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2 rubber bands
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glass measuring cup, 1-cup capacity
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teaspoon
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tablespoon
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all-purpose flour
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granulated sugar
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water, room temperature
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2 packets of Active Dry Yeast (each packet is 1/4 ounces or 2 -1/4 tsp)
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?
