1. Heterogeneous Mixtures:
* Suspensions: These are mixtures where particles are large enough to be seen and settle over time. For example, sand in water or flour in water.
* Colloids: These have smaller particles than suspensions but still large enough to scatter light (the Tyndall effect). Examples include milk, fog, and paint.
2. Homogeneous Mixtures:
* Solutions: These mixtures have particles that are completely dissolved and evenly distributed. The mixture looks the same throughout. Examples include salt water, sugar in water, and air.
While some resources might list mechanical mixtures as a third category, it is essentially just another term for heterogeneous mixtures. It's important to note that the distinction between these types of mixtures is based on the size and distribution of the particles within the mixture.