It does a mind good! Learners experiment with a combination of food coloring, detergent, and milk. They observe how the food coloring reacts with the different liquid combinations and relate their observations to the charges on the fat, protein, and water particles.

Concepts

water, fats, protein, negative charges, positive charges

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Instructional Ideas

• Incorporate additional liquids to study and compare results to the detergents

Classroom Considerations

• Requires a specific set of materials and time for set up
• A basic understanding of subatomic particles is helpful

Pros

• Provides images showing what to expect
• Includes an explanation of the science concepts observed in the experiment

Cons

• None