How Soap Defeats Grease: The Chemistry of Surfactants and Micelles (Parent Q&A)

This guide helps parents support learners aged 11 to 16 as they explore how soap and detergents help water remove greasy dirt. It explains polarity, surfactant structure, surface tension, micelles, hard water and the difference between dispersing and dissolving grease. It also includes a small, safe investigation comparing water, soap solution and washing-up liquid. The central idea is that soap usually lifts, divides and disperses grease rather than destroying it.