You eat a buttery snack. Your hands feel oily and slippery. You rinse them with just water… and they're still greasy! 😣
Soap is the secret hero. Let's find out how this tiny bubble-maker grabs grease and washes it away! Tap Next to begin. 👉
Grease (oil, butter, fat) and water push away from each other. That's why a little oil floats on top of water and never blends in.
Tap each jar to peek inside!
Every soap molecule looks like a tiny tadpole. It has a head and a long tail, and each end likes a different thing.
Tap the head and tap the tail to learn their secret jobs!
Remember this: the head is a water-lover, the tail is a grease-lover. That double power is the whole trick! 🦸
When you scrub with soap, all the grease-loving tails poke straight into the blob of grease. Drag each soap molecule so its tail sticks in!
Drag the 3 soap tadpoles onto the grease blob. 0 / 3 done
The tails hide inside the grease, so all the water-loving heads point OUT toward the water. They wrap the grease in a little ball called a micelle.
Now the grease is trapped inside a friendly water-loving shell. Water is happy to carry the whole ball away! 🌊
Because the outside of the micelle loves water, the rushing water grabs it and washes the trapped grease right down the drain.
Quick check! A soap molecule's tail dives into grease. So what does the soap molecule's head like best?
Hint: the head is the end that points OUT so the water can carry the whole ball away.
Next time you wash your hands, picture millions of tiny soap tadpoles grabbing the grease for you. 👏 Great learning, scientist!