Amazing Potato Straw Experiment
Imagine you have a potato in one hand and a straw in the other. When you try to poke the straw into the potato, nothing happens… The straw bends or slips away. Of course, a potato is pretty firm! But here comes the trick. Hold the straw firmly, place your thumb over the hole, and press again. Suddenly, the straw shoots through the potato as if it were made of butter. Magic? No, it's physics! Now you'll learn why this works and what’s behind it. Try it out and impress your family with your new superpower!
What you'll need
- Raw potato
- Paper straw
- Optional: Various vegetables
How it works
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Hold the potato firmly with one hand. Take the straw and try to poke it into the potato with a swing. What happens? The straw bends or slips off. The potato is too hard, the straw too soft. No chance!
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Now comes the secret trick. Hold the straw again, but this time place your thumb over the hole. Now try again! With a quick, firm push, the straw suddenly goes into the potato.
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When your thumb seals the top end of the straw, the air inside gets trapped. The air molecules can’t escape and create counterpressure. This pressure makes the straw much more stable. That’s how it can pierce the potato!
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Now you can surprise everyone with a simple trick and understand a bit of physics along the way. So, who dares to take the next round? Does it work with other vegetables, like a carrot or an apple? Give it a try.
What kids learn from this
- Curiosity & scientific thinking
