Classroom mode
Run it in class
Why does a balloon get squished when you dive deep in a pool?
Show of hands — before you project anything
Compare both raw A/B records without naming a result before the watched test.
- A Way more than you'd guess
- B About what you'd guess
- C Way less than you'd guess
Count the votes out loud. Hold them to it — then watch.
Project it (fullscreen)
Discussion prompts
- 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
A prediction-first worksheet — no answer key.
zero prep · no login · any projector
Winding down at home? Family mode ·
Explore every question
Why does a balloon get squished when you dive deep in a pool?
Predict — what do you think will happen, and why?
Talk about it
- 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.