You are not sad. You are not crying because the onion is mean!
When someone cuts an onion in the kitchen, everyone's eyes start to sting and water. There is a sneaky bit of science hiding inside that onion. Let's become detectives and find out what's really going on. 🔍
👉 Tap Next to open up the onion and look inside!
An onion is made of millions of tiny cells — like teeny boxes too small to see. Inside these boxes, the onion keeps two special things stored apart, in separate rooms:
Tap each box to peek inside 👆
While the onion is whole, these two things — the helper and the sulfur stuff — stay in different boxes and never touch. So nothing happens, and nobody cries. 😌
When you cut or chop the onion, the knife smashes open thousands of tiny boxes at once. Now the two things that were kept apart can finally bump into each other.
A whole onion sitting on the table doesn't sting your eyes. It only happens when the boxes are broken open. That's a big clue! 🕵️
When the helper meets the sulfur stuff, they do a quick chemistry trick and make a brand-new gas. Scientists have a very long name for it, but we can just call it the "crying gas". 💨
Tap BOTH ingredients to mix them together…
The crying gas floats up and touches the wet surface of your eyes. There it turns into a tiny bit of something stingy (a mild acid). Your eyes don't like that one bit!
So your eyes do something clever: they make lots of tears to wash the stingy stuff away and protect you. That's why you cry — your eyes are cleaning themselves! 💧
Now that we know the secret, we can outsmart the onion! Tap each idea below. Which ones really help stop the tears?
Tip: tap a card again if you change your mind. Find all the helpful tricks! 🌬️🧊🔪
You're now an onion detective. Here's the whole story:
So next time the kitchen smells of onions and your eyes water, you can smile and say:
"That's just chemistry — my eyes are protecting me!" 😎👏