Why does a balloon get squished when you dive deep in a pool?
Open for the projector Present it step by step
Classroom mode
A question for the whole room
One story to open. A room full of ideas to test.
Ready in three steps
- Open the story.Read and try the first pages together.
- Pause for a prediction.At the story’s question, read its choices aloud. Invite a vote and ask, “What makes you think that?”
- Run it. Watch. Wonder.Choose the class’s prediction, run the experiment, and compare what happened with your guesses.
Different guesses are welcome. The experiment gives everyone something to rethink.
Something to put on paper
A one-page prediction and observation sheet. No answers included.
After the experiment: discussion notes
Talk about what happened
- Compare both raw A/B records without naming a result before the watched test.
- Explain why added width leaves pressure unchanged only when depth, density, and gravity match.
- Separate pressure on a flexible gas pocket from pressure on water-rich tissue and from pressure difference across an eardrum.
Where it shows up in real life
- Ears feeling pressure during a shallow pool descent
- A fish swim bladder changing with depth
- Submarines and pressure housings resisting greater outside pressure
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