Jim Baker Yeast Challenge -Part II

Objective:  Determine the optimum temperature/sugar mix to maximize C02 production.
Purpose:  To demonstrate an understanding of engineering principles.

Equipment:  2 Thermometers, 4 250ml beakers, 24g yeast, sugar, spoons, Hot plate, Water plate w/ wire rack.

Your procedures were signed off at the end of class on Thursday.  Most of you decided to do some permutation of 2 temperatures w/ three different concentrations, or 3 temperatures w/ two concentrations.  All lab stations are already set up for you to conduct your investigation.

• Each lab station already has all of the necessary equipment. There are also two hot water pots you can use to pre-heat your water.  
• Please ensure you unplug the hot plates, and rinse out the beakers when you are done.  
• For multiple temperature trials, do the hottest temperature first. You can then cool that water down while your group is preparing for the next series.  
• Consider how to do this as a group, rather than just having everyone try to do everything... (group efficiency.)
• ALL data MUST be gathered today, there will be no further opportunities.  
• You are restricted to only 6 treatments (24g of yeast) total.  I do not have enough yeast to go beyond that.

When you are done, you can start working on your group poster.  Here is a quick summary of the expectations:

Jim Baker Bioengineering Solution Poster

·         Section 1:

o   Research Objective & Purpose

§  Why were we doing this experiment?

o   Ideas Explored

§  In your groups, you discussed a few different experiments before deciding on the one you did. What were some of those ideas that you didn’t go with? Why didn’t you choose them?

o   Hypothesis

§  What did you think would happen?

·         If manipulated, then responding, because science.

·         Section 2:

o   Procedures

§  In 3-5 sentences, explain your experimental procedure.

§  Use a diagram if helpful.

o   Variables

§  Manipulated, responding, and controlled variables should be listed

·         Section 3:

o   Data & Calculations

§  A clean, and easy to read data table should be included

o   Graphs

§  A labeled graph of some sort (you can decide which type would be best) should be included

·         Section 4:

o   Conclusions & Recommendations

§  ClEvR Statement for Jim Baker

·         “Claim” should be your recommendation for his design challenge

·         “Evidence” can come from any parts of experiments 1, 2, and/or 3.

·         “Reasoning” should show how the evidence supports the claim. It should also provide a scientific reason as to “WHY” you got the results you did.

o   Changes & Future Research

§  If you ran your same experiment again, what changes would you make?

§  If there was a “Part-4” to this yeast lab, what research could you further do to help solve Jim Baker’s Design Challenge?