4-6

• • Physical properties: Properties of a substance we can see.
  • Physical change: A Change in the form of matter that does not alter its chemical composition
  • Chemical change: always results in the formation of a new substance or substances.
  • Chemical property: describes the ability of a substance to change into a new substance or substances.
• • Mixtures: Have two or more different types of particles
  • Mechanical mixtures: In a mechanical mixture you can see the different bits.
  • Solutions: The different substances that make it up are not visible
  • Suspension: A cloudy mixture with tiny particles of a substance held together.
• • Pure substances: Made of only one type of particle. (unique set of properties)
  • Elements: the most pure kind of substances with only one kind of atom

  Compounds: Made up of two or more elements together.