Here's why:
* Mixtures are not chemically combined: The substances in a mixture are simply physically mixed together. This means the molecules of each substance remain separate and don't change their chemical structure.
* No new substances are formed: Unlike a chemical reaction where new substances are formed, a mixture simply results in a combination of the original substances.
* Properties are preserved: Since the chemical makeup of the substances doesn't change, their individual properties, such as color, smell, melting point, and density, remain largely unchanged.
Example:
* Salt and pepper: When you mix salt and pepper, you still have salt crystals and pepper granules. You can easily separate them again based on their different properties.
* Sand and water: The sand particles stay separate from the water molecules, and the properties of sand (solid, gritty) and water (liquid, clear) remain distinct.
