Classroom mode
Run it in class
Why do oil and water return to separate layers after shaking?
Show of hands — before you project anything
Why does dividing the same oil into more droplets increase the total boundary?
- 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
- Why does dividing the same oil into more droplets increase the total boundary?
- How is a cloudy droplet dispersion different from a dissolved solution?
- Which part of the story is about molecular preference, and which part is about gravity and density?
Where it shows up in real life
- Oil-and-vinegar dressing that becomes cloudy when shaken and later returns to two regions
- A rainbow oil sheen that gathers into patches on a puddle
- Tiny oil droplets briefly spread through dishwater after a greasy pan is swirled
A prediction-first worksheet — no answer key.
zero prep · no login · any projector
Winding down at home? Family mode ·
Explore every question
Why do oil and water return to separate layers after shaking?
Predict — what do you think will happen, and why?
Talk about it
- Why does dividing the same oil into more droplets increase the total boundary?
- How is a cloudy droplet dispersion different from a dissolved solution?
- Which part of the story is about molecular preference, and which part is about gravity and density?