Pure Substances and Mixtures

Pure Substances and Mixtures

Pure Substances: materials that are composed of only one type of particle and cannot be separated into any other substance by a mechanical means (cutting and reshaping)

Mixtures: materials that contain 2 or more pure substances able to separate by mechanical means (melting, filtering)

Homogeneous Mixture: Uniform in composition that is more difficult to separate into pure components

Examples: Air, Solutions (uniform)

Heterogeneous Mixture: not uniform composed of multiple parts that can be separated by mechanical means

Examples: Salad, trail mix, bag of nuts and bolts