Heterogeneous mixtures are those where the components aren't uniformly distributed and can be visually distinguished.
Suspension: A type of heterogeneous mixture where solid particles settle out over time if left undisturbed.
Emulsion: A suspension of tiny droplets of one liquid in a second liquid with which the first will not mix, such as oil and water.
Aggregate Material: Materials composed of various distinct parts that don't blend together, like concrete.