Summary

• Matter is anything that takes up space and has mass.

• Matter can be divided into pure substances and mixtures.

• Pure substances are made up of one type of particle and cannot be physically separated into other substances.

• Mixtures are made up of more than one type of particle and can be physically separated into other substances.

• Mixtures can be classified as homogeneous or heterogeneous.

• Homogeneous mixtures consist of a single phase and have a uniform composition.

• Heterogeneous mixtures consist of two or more phases and do not have a uniform composition.

• Solutions are mixtures that are homogeneous at the macroscopic and microscopic level.

• Coarse mixtures are mixtures that are heterogeneous at the macroscopic and microscopic level.

• Colloids are mixtures that are homogeneous at the macroscopic level but heterogeneous at the microscopic level.

• Colloids can be distinguished from solutions as they are opaque whereas solutions are transparent; colloids can also be spun into different phases whereas solutions cannot.