fact
Floating and mixing answer different questions
One explains the layer order; the other explains whether layers persist.
“Oil floats” does not fully explain why oil and water separate.
Ordinary cooking oil is less dense than water, which explains why it sits above water in a separated sample. Their molecular interactions explain why they do not form a lasting solution together. Density and dissolving behavior are different properties, so a complete explanation needs both ideas.
A reading record for your pathways. It does not certify a kitchen or a skill.
Checking this browser…
Behind the explanation
- American Chemical Society: Density: Sink and Float for Liquids ↗
Vegetable oil is less dense than water; density explains which layer is above the other, while poor mutual solubility permits separate layers.
- American Chemical Society: Can Liquids Dissolve in Water? ↗
Some liquids form solutions in water while oil does not; molecular interactions explain the difference.
Version 1 · Sources checked 2026-09-25