Oil and Water Separate
Mixed droplets separate into layers.
Teaching & key ideas
What you do: Shake jar and let it sit.
What students see: Mixed droplets separate into layers.
Why it works: Water and oil molecules interact differently; oil is also less dense.
Question to ask: Why do the liquids separate again?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why do the liquids separate again?