Blog > Fermentation #1 – Ingredients Find A Store 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 Fill each soda bottle with one packet of yeast, 1 teaspoon sugar and 1 cup of room temperature water. Mix together. In one soda bottle, add 2 tablespoons all-purpose flour. Mix together. Secure a balloon on top of each soda bottle with a rubber band. 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?