LESSON 7: Milk Rainbow

92 LESSON 1:Goofy Putty92 LESSON 1:Goofy PuttyYou Be The Chemist Activity Guides |page 92 You Be The Chemist Activity Guides |page 92 You Be The Chemist Activity Guides |page 92 You Be The Chemist Activity Guide |page 92 LESSON 7:Milk RainbowESTIMATED TIMES etup:5 minutes|Procedure:5 10 minutes DESCRIPTIONC reate swirls of color in milk and explore a propertyof liquids known as surface tension. OBJECTIVEThis LESSON will demonstrate the property of surfacetension and the effect that soap, a surfactant, has on thesurface tension of milk. Students will apply soap tomilk with food coloring on the surface to visualize theeffect of soap on the surface tension of milk.

FORMULAS & EQUATIONS Milk is a liquid made mostly of water, but it also contains vitamins, minerals, fats, and proteins. Milk is a unique substance known as a colloid, so it does not have a specific chemical formula. A colloidis a mixture in which very small particles are spread evenly through another substance.

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  Water, Equations

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