Here's why:

* Mixture: A combination of two or more substances where each substance retains its own chemical identity.

* Not Chemically Combined: The substances in a mixture are physically mixed, meaning they are not chemically bonded together.

* Examples: Salt and pepper, sand and water, air (a mixture of gases).

Key Points about Mixtures:

* Components can be separated by physical means (e.g., filtration, evaporation, magnetism).

* The proportions of the components can vary.

* The properties of a mixture are a combination of the properties of its components.