Substances, Mixtures, and Solutions
Substance: A substance is something that can’t be broken down into simpler parts and physical changes won’t alter its composition. A substance is made of a single compound. For example, water (H2O) is a substance. No matter what physical processes you put water through (like freezing or boiling), water will remain H2O.
Mixture: A mixture, on the other hand, is made of different substances that are mixed together that aren’t chemically bonded. Salad dressing is a mixture of different things, like oil, herbs, and lemon juice. A salad is also an example of a mixture.
There are two kinds of mixtures
Sometimes, homogenous mixtures are called solutions. A solution is made of a solute and a solvent.
For example, some sports drinks are a solution that is made of water (the solvent) and powdered sports drink mix (the solute).