Design an Experiment with Yeast

By Thursday's class, 2/28/07, design an experiment with yeast.

Ingredients and materials to make an experiment with yeast:

Yeast dated to expire:
12/16/06
4/23/06
1/5/05
11/17/06
07/09

Sugar
Salt
One test tube per student
Water
Flour
Clear plastic jars with lids
Thermometers
Droppers
A test tube stand

Using the above materials, design an experiment with yeast. Your experiment could be a comparison, a limits test, or a test of optimal conditions.
Write down the procedure.
Be sure to include a hypothesis and control.
Make a chart in your logbook for recording your results.