What is composed of different substances that have been physically combined and unevenly mixed?

A heterogeneous mixture consists of two or more materials that have been physically combined but are unevenly mixed and easily identifiable. The materials or components of the such mixtures can be easily separated by physical means. Example include: 1. Mixture of water and oil. 2. Mixture of gold powder and silver powder 3. Mixture of sand and iron filings 4. A salad 5. trail mix 6. a conglomerate rock 7. Mixture of sand and water. Mixtures are physically combined structures that can easily be separated into their original contents.