A mixture where you cannot see the parts is called a solution.

A solution is a mixture where a solid or a liquid is mixed into a liquid so well that you cannot see the parts.

One material breaks into pieces too small to see and spreads all through the liquid.

Sand in water is a mixture, but not a solution. Sugar in water is a solution.

Every solution is a mixture, but not every mixture is a solution.

The five mixtures, and which of them are solutions.

A spoon of sugar, before it goes into the water.

A glass of water with sugar stirred in.

Oil floating on water in a glass.