Why does milk overflow when boiled but water does not?

You might have seen your mother getting upset when she forgot to turn off the gas stove and the milk spilled over. But have you ever thought🤔 that why is it that milk spills over while boiling but water doesn’t? Let’s find out.

Milk🥛 is made up of water, protein, sugar, and fat. When you boil milk, the protein and fat rise to the top and form a layer of cream. Yep, that exact creamy layer which most of you don’t like in your milk.😐

The water in milk also boils and comes up as vapour, but the vapour cannot escape as it is trapped below the cream.🧐

So, when milk becomes hot, the vapour starts to expand but since it is trapped under the cream, it pushes the cream upwards and so, the milk spills over.🙁

How can you prevent the milk from spilling?

Simple, take a spoon🥄 and stir the milk or simply switch off the gas stove. This way the water vapour will not get trapped under the cream and the milk will not spill over.👍

You can refer to the video