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Experiment 2
Spoiled Milk: How do different temperatures of liquid affect its rate of spoilage?

Purpose/Hypothesis

The two main groups of bacteria in milk are Lactic acids and Coliforms. Lactic acid is the natural bacteria present in milk and dairy products. Coliforms are the main reason for milk spoilage. Pasteurization kills almost all of the bacteria, but some of the bacteria that cause milk to spoil still remain. If these bacteria are given an environment that promotes growth, they will rapidly multiply.

In this experiment, you will be conducting two mini-trials in which you will determine how temperature affects the rate of milk spoilage. You will examine the environmental temperatures that affect milk by allowing glasses of milk to sit in cool, warm, and roomtemperature environments. You will also determine how the temperature of the...

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1. Introduction
2. Attack of the microbes
3. The leftover that became a home
4. Slowing spoilage
5. All by themselves
6. Experiment 1 - Preservatives: How do different substances affect the growth of mold?
7. Experiment 2 - Spoiled Milk: How do different temperatures of liquid affect its rate of spoilage?
8. Design Your Own Experiment