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In this simple activity, learners use water and liquid dish detergent to see which one removes lipstick better from an index card. The detergent works better because it binds to both the water and the greasy lipstick. Since grease and water don't mix, the water alone doesn't work well at all. There is not much chemistry background provided for this activity, but it specifically mentions soap and hand washing, so it could make a good activity to connect with a health week celebration or lessons on preventing disease transmission.
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