Classroom mode
Run it in class
Where does a helium balloon go when you let it go?
Show of hands — before you project anything
Predict before we test: does a helium balloon float to space, float forever, or pop?
- 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
- Predict before we test: does a helium balloon float to space, float forever, or pop?
- Predict: as the balloon climbs into thinner air, does it get smaller, stay the same, or swell up?
- Predict: what pushes the balloon up — the helium inside, or the air outside?
Where it shows up in real life
- Weather balloons that swell to house-size and burst near 30 km, then parachute their sensors home
- Blimps and airships, which float on lighter-than-air gas but stay low on purpose
- Deep-sea floats that 'fall up' toward the surface because they're lighter than the water around them
A prediction-first worksheet — no answer key.
zero prep · no login · any projector
Winding down at home? Family mode ·
Explore every question
Where does a helium balloon go when you let it go?
Predict — what do you think will happen, and why?
Talk about it
- Predict before we test: does a helium balloon float to space, float forever, or pop?
- Predict: as the balloon climbs into thinner air, does it get smaller, stay the same, or swell up?
- Predict: what pushes the balloon up — the helium inside, or the air outside?