A hard little seed goes into the pot… and out jumps a soft, fluffy cloud!
How does a tiny, rock-hard kernel turn into a puffy snack? 🤔
There's a clever bit of science hiding inside. Let's crack the mystery together — tap Next to begin!
Every popcorn kernel is like a tiny treasure box. Tap each part to find out what's inside!
👆 Tap the hard outer shell, the white starch, or the water drop.
Inside every kernel is a tiny drop of water. When it gets hot, the water turns into steam (water as a gas). Slide to heat the kernel up!
Cold kernel. The water is just sitting quietly. 💧
The steam wants more room, but the hard shell traps it inside. So the pressure keeps climbing — like blowing up a balloon that can't get bigger!
Tap the kernel again and again to trap more steam. Watch the gauge fill!
Pressure: low. Keep tapping! 👆
When the pressure gets too strong, the shell can't hold on. It bursts open! The trapped steam escapes and the soft white starch puffs out fast, turning fluffy.
Click the button to set off the pop.
The fluffy part is the cooked starch that puffed up — like a fast-rising sponge! 🧽
Ever found hard, un-popped kernels at the bottom of the bowl? They need two things to pop: the right amount of water inside, AND a shell with no cracks to trap the steam.
Question: A kernel has a tiny crack in its shell. What happens when you heat it?
You know the whole story now! Use the arrows to put these steps in the right order, then tap Check.
Here's the whole story in one breath:
💧 A kernel hides a tiny drop of water inside a hard shell.
🔥 Heat turns that water into steam.
💨 The hard shell traps the steam, so pressure builds and builds.
💥 The shell bursts — POP! — and the soft starch puffs out fluffy.
🤫 No water or a cracked shell? Then the kernel stays quiet.
Next time you eat popcorn, you'll know exactly why it jumps! Great work, scientist. 🌟