Book 13, Question 94
Why Does Milk Look White When Water Is Clear?
Milk is mostly water with tiny droplets of fat and bits of protein floating in it. These specks bounce every color of light in every direction. Mixed colors reach your eyes together, so you see white.
More fun facts
- Milk is about 87 percent water.
- It also contains proteins, fats, minerals and a sugar called lactose.
- The main protein in milk is casein.
- Tiny particles of casein floating in the water make milk look white.
- A glass of water from the faucet looks colorless.
Sources: National Geographic, U.S. Geological Survey
Questions kids ask
If milk is mostly water, why isn't it clear?
Tiny bits of casein protein floating in it make it look white.