* Homogeneous Mixtures: The composition is uniform throughout. This means that no matter where you take a sample, it will have the same proportions of each component. Examples include saltwater, air, and sugar dissolved in water.
* Heterogeneous Mixtures: The composition varies throughout the mixture. Different parts of the mixture will have different proportions of the components. Examples include sand and water, oil and water, and a salad.
In summary:
* Homogeneous mixtures have a consistent composition.
* Heterogeneous mixtures have a varying composition.