key terms

• pure

  • a pure substance is a single element or compound, not mixed with any other substance
• formulation

  • a mixture that has been designed as a useful product
  • formulations are made by mixing the components in carefully measured quantities.
  • formulations include fuels, cleaning agents, paints, medicines, alloys, fertilisers and foods
• melting point

  • the temperature at which a substance turns from a solid to a liquid