Here's why:

* Different substances: A mixture involves two or more substances that are different from each other.

* Remain the same individual: The substances in a mixture don't chemically combine. They retain their own individual properties.

* Separated by physical means: You can separate the components of a mixture using physical methods like filtration, evaporation, distillation, magnetism, or handpicking. These methods don't change the chemical makeup of the substances.

Examples of mixtures:

* Salt and pepper: You can easily separate them with a spoon.

* Sand and water: You can separate them by letting the sand settle and pouring off the water.

* Air: A mixture of gases like nitrogen, oxygen, and carbon dioxide.

* Salt water: You can separate the salt and water by evaporation.

Let me know if you'd like more examples or have any other questions about mixtures!