Summary:
- A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.
- A pure substance or a homogeneous mixture consists of a single phase.
- When oil and water are combined, they do not mix evenly, but instead form two separate layers.
- Soil is composed of a variety of substances and is often of different composition depending on the sample taken.
- Whether the air is clean or smoggy, it's a collection of molecules.
- See what it's made of in this simulation.