Heterogeneous mixtures are mixtures in which the components are not uniformly distributed throughout the mixture. This means that different parts of the mixture may have different compositions. Heterogeneous mixtures can be identified by the fact that they appear to be non-uniform, and the components can often be seen separate from each other. Examples of heterogeneous mixtures include sand and water, oil and water, and rocks.

Homogeneous mixtures are mixtures in which the components are uniformly distributed throughout the mixture. This means that the composition of the mixture is the same throughout. Homogeneous mixtures can be identified by the fact that they appear to be uniform, and the components cannot be seen separate from each other. Examples of homogeneous mixtures include salt and water, sugar and water, and air.

The main difference between heterogeneous mixtures and homogeneous mixtures is the uniformity of the distribution of the components. In heterogeneous mixtures, the components are not uniformly distributed, while in homogeneous mixtures, the components are uniformly distributed.