How to Make the Most Dough With the Yeast Bread!

Procedure

1. Flip a coin to decide who is the Timer and who is the Scientist.
2. The Scientist must read the lab to the Timer.
3. After reading the procedure, collaborate on
   
   • a hypothesis and write it in the space provided on the Report Template.
   • identify the independent variable, dependent variable and list four (4) controlled variables and write your answers in the space provided.
     
4. Label the graduated cylinders as follows:
   
   • Cylinder #1 = table sugar
   • Cylinder #2 = powdered milk
   • Cylinder #3 = juice
5. Add 50 mL of warm water and 5 mL of sugar to Cylinder #1
6. Add 50 mL of warm water and 5 mL of powdered milk to Cylinder #2
7. Add 50 mL of warm juice to Cylinder #3
8. Open the package of dry yeast and examine it and describe it in the space provided.
9. Add 2 mL of yeast to each of the three cylinders. The Timer should start the stopwatch and alert the Scientist when 5, 10 and 15 minutes have passed.
10. Make quantitative observations on the height of the foam produced in each of the cylinders after 5 minutes, 10 minutes and 15 minutes. Record them in Table 1– Quantitative Observations Chart.
11. Make Qualitative observations on the reactions in each cylinder, including the odour produced. Record them in Table 2 – Qualitative Observations Chart.
12. Pour the contents of each cylinder down the drain, rinse and repeat a second time.
    
13. Switch roles.
14. Wash your hands.
15. Complete the Applying Your Knowledge Questions.
16. Complete the Self- and Peer Evaluations.
17. Present the Essential Skills Certificate of Excellence to your partner.