Pure and Impure substances

• What is a pure substance?

  A substance that only contains one type of element or compound
• Describe the properties of pure substances?

  The melt and solidify at one point , called the melting point. They also boil and condense at one point , called the boiling point
• Give an example of a pure substance?

  Pure milk
• What is an impure substance?

  A substance that is a mixture
• Describe the properties of impure substances?

  They melt and boil over a range of temperatures