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

• teaspoon

• tablespoon

• all-purpose flour

• granulated sugar

• water, room temperature

• 2 packets of Active Dry Yeast (each packet is 1/4 ounce or 2-1/4 tsp)

PROCEDURE
1. Fill each soda bottle with one 1/4 ounce package of Active Dry Yeast, 1 teaspoon sugar and 1 cup of room temperature water.
2. In one soda bottle, add 2 tablespoons all-purpose flour.
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?