Yogurt: Milk meets Bacteria

Introduction

     Bacteria has been infecting humans and other life forms since the early 1800's. Although bacteria is know to cause a great deal of death and devastation, it can also promote life by bringing good health. Probiotics found in foods such as yogurt can actually help our digestive systems and further make us human more healthy.

Objective

     Our Objective in this "Yogurt Lab" is to understand why bacteria is a vital element to human nature. Also, by doing this lab, we will know how to make delicious yogurt!

Procedure

     We begin our yogurt lab by first obtaining four vials of milk. In each vial were several controls, such as Ampicilin, Yogurt mix, and E. Coli. We then mixed the ingredients together and let the substances sit overnight for 24 hours.  

Hypothesis/Controls/Variables

     I think that the vial with the yogurt-mix will be the only one to produce yogurt because the vial with the ampicilin with only kill the bacteria necessary to create yogurt. Also, i don't think the vial with E. Coli will not be effective to a certain extent.

Results/Observations

     Our results came out as i had originally hypothesized. The vial containing the yogurt-mix was the only one to produce yogurt while the rest were still a milky-texture.

     These results were not surprising to me, but there are sources of error that could have compromised our results such as; the amount of milk per vial, how much of each substance was mixed with the milk, the temperature of the substances etc.