A physical combination of two or more substances is called a mixture.

Here's why:

* Physical combination: The substances in a mixture are not chemically bonded together. They retain their individual properties.

* No new substance is formed: A mixture can be separated back into its original components by physical means (like filtration, evaporation, or magnetism).

Examples of mixtures:

* Salt and pepper

* Sand and water

* Air (a mixture of gases)

* Salad (a mixture of vegetables)