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Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
Science Chapter Two
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Science Chapter Two

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  • 1. Pure Substances Every sample of a given substance has the same properties because a substance has a fixed, uniform composition.
  • 2. Elements and Compounds An element has a fixed composition because it contains only one type of atom. One capital letter A compound always contains two to more elements joined in a fixed proportion. More than one capital letter
  • 3. The properties of a mixture can varyMixtures because the composition of a mixture is not fixed. Heterogeneous Homogeneous Comes from the Greek One mixture so thoroughly words: dissolved in another mixture that it is hard to distinguish between the two Hetero: Different: in the mixture. Geneous: Kind Ex: salt water.
  • 4. Colloids Suspensions, Solutions,Based on the size of its largestparticles, a mixture can be classified as asolution, a suspension, or a colloid. Solution A homogeneous mixture that does not separate into layers over time Can be seen through Must be separated chemically
  • 5. Colloids Suspensions, Solutions,Based on the size of its largestparticles, a mixture can be classified as asolution, a suspension, or a colloid. Suspension A heterogeneous mixture that separates into layers Can be separated physically
  • 6. Colloids Suspensions, Solutions,Based on the size of its largest particles,a mixture can be classified as a solution,a suspension, or a colloid. Colloid Particles in between solutions and suspensions. Do not separate into layers Cannot be separated by a filter
  • 7. Lava with high Lava with lowviscosity viscosity Viscosity • The thickness of a liquid • The higher viscosity, the thicker the liquid.
  • 8. Separation techniques Distillation A process that separates a solution based on boiling points
  • 9. Separation techniques Filtration A process that separates materials based on the size of their particles and/or solubility.
  • 10. Separation techniques Evaporation A process used to isolate a solid dissolved in a liquid, Property: solubility
  • 11. Flammability Flammability is a material’s ability to burn in the presence of oxygen. The ability to burn is not a physical property because you cannot observe burning without changing the composition of the of the material that is burning.
  • 12. Reactivity Reactivity is the property thatdescribes how readily a substancecombines chemically with othersubstances.
  • 13. Chemical and PhysicalChanges
  • 14. Precipitates Any solid that forms and separates from a liquid mixture is called a precipitate.
  • 15. Review Question One
  • 16. Review Question Two
  • 17. Review Question Three
  • 18. Review Question Four
  • 19. Review Question Five

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