Here's why:

* Mixtures are formed by physically combining different substances. This means the substances are not chemically bonded together.

* Each substance in a mixture retains its own properties. You can often separate the components of a mixture by physical means, such as filtration, evaporation, or magnetism.

For example, a salad is a mixture of different vegetables, each with its own distinct properties. Saltwater is a mixture of salt and water. Air is a mixture of gases like nitrogen, oxygen, and carbon dioxide.