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In this lab, students make a prediction about how many drops of tap water will fit on both he heads' and tails' sides of a penny. Students observe the effect of surface tension and inter molecular forces on the water. Students then test the effects of soapy water on the surface tension. Questions are provided to help students formulate a conclusion after testing their hypothesis.
Materials needed per group are: 1 penny, water, soap, 1 dropper, and 1 paper towel.