Lesson Plan: Purity and Mixtures Science

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to identify pure substances and mixtures, give examples, and compare the arrangement of particles.


Students will be able to

  • explain what is meant by a pure substance,
  • describe how the purity of a substance can be determined by its physical properties,
  • define what is meant by a mixture,
  • compare mixtures to compounds and elements in terms of the particles involved,
  • give examples of common mixtures found in everyday life,
  • outline how mixtures can be separated by physical methods,
  • analyze the properties of the different components in a mixture to assess its overall properties.


Students should already be familiar with

  • the particle model.


Students will not cover

  • the specific vocabulary related to solutions and their formation,
  • how alloying changes the properties of a metal.

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