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Soap foams because soap molecules reduce the surface tension of water; this allows bubbles (small air pockets) to form between water and air.The Two Ends of the Molecule – What Is Soap?One end of a soap molecule loves water (hydrophilic, from “hydro‑=water” and “‑philic=loves”), while the other end repels water (hydrophobic), meaning “water-avoiding”.When water and air meet, this unique structure helps the water spread out like a thin film and traps air, creating foam.Reduction of Surface Tensio

Our hands touch many surfaces throughout the day. While playing, eating, opening our notebooks, or gripping door handles, we unknowingly come into contact with germs. These germs are invisible to the naked eye but can affect our health. Handwashing is the simplest and most effective way to remove them.Time TravelIn the past, people did not know about germs. In the 1800s, a scientist discovered that washing hands with soap prevents illness. This discovery transformed the understanding of hygiene.