Make sure your sound is turned on Fermentation Lab Prep Make sure your sound is turned on

C6h12o6 = 2ch3ch2oh +2co2 + energy Fermentation is the breakdown of carbohydrates by enzymes, bacteria yeasts, or mold in the absence of oxygen. Lactic Acid Fermentation Glucose Glycolysis (pyruvic acid) Lactic acid + 2 ATP Alcoholic Fermentation Glucose Glycolysis (pyruvic acid) Carbon Dioxide + Ethyl Alcohol 2 ATP C6h12o6 = 2ch3ch2oh +2co2 + energy Glucose Ethyl Alcohol Carbon Dioxide

1 Erlenmeyer flask 1 glass stirring rod 2 beakers Sugar scissors yeast balloon 1 thermometer

String ruler meterstick Sharpie worksheet pencil

1. Measure 100 ml of water 2. Check to make sure the water is warm: the temperature is 41 C

3. Add yeast to water 4. stir, then add yeast mixture to a flask

6. Place the balloon over the top 5. Add a cube of sugar

7. Wrap string around the balloon 8. Measure the string to determine the circumference

Develop a question drawn from the information you have learned about yeast fermentation Form a testable hypothesis Make a prediction Develop a procedure using the same tools and materials in this example. You and your lab group member (or members) will need to discuss and agree before submitting your decision in writing. Now What?

Design and present your findings You will be conducting this lab over a 2 day period Day 1: collecting data Day 2: Analyzing data and writing a formal lab report. Design and present your findings