The Big Picture

Yeast
Fermentation

How to Make the Most Dough With the Yeast Bread!

Lab Activity

Purpose:

To compare the growth of yeast with skim milk, table sugar, and juice. The higher the level of foam produced, the greater the growth and population of yeast.

Safety Precautions

Chemical safety glasses
Wash hands thoroughly after completing the lab

Materials:

Freeze-dried active yeast
Three 100 mL graduated cylinders
Thermometer
Warm water (about 35°C)
Warm apple juice or grape juice (about 35°C) (glucose & fructose)
Table Sugar (sucrose)
Powdered skim milk
Stop Watches

thermometer

stopwatch

ROLE OF THE TIMER:	ROLE OF THE SCIENTIST:
Working with Others, Oral Communication and Numeracy are the Essential Skills for this role.	Reading Text, Oral Communication, Writing, Numeracy and Working with Others are the Essential Skills required for this role.
Collect the materials required for the experiment. Time the reaction and inform the Scientist to measure at 5, 10 and 15 minutes.measure at 5, 10 and 15 minutes. Return the materials.	Read the procedure to the Timer. Write the hypothesis, independent, dependent and controlled variables. Perform steps 4 to 13 in the procedure. Record the observations.