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Transcript

  • 1. Physical Properties and Mixtures By JessicaOct ob er 18, 2012
  • 2. What is a Pure Substance?Made of Elements and CompoundsSame molecules throughout
  • 3. What is an ElementType of pure substanceOne type of molecule throughout100 types of elementsMost solid at room temperatureEx: Mercury (Hg), Oxygen (O)
  • 4. What is a Compound?Type of pure substanceDifferent types of moleculesAll same properties except one
  • 5. What is a Mixture?A mixture is matter that is not uniformthroughoutIt has different types of molecules and atomsDifferent Properties
  • 6. What is a Homogenous Mixture?Type of mixtureLooks same throughoutmolecules are not uniformSolutions are Homogenous MixturesEx: salt water, air, ketchup, chicken consommé
  • 7. What is a Heterogenous Mixture?Doesn’t look the same throughoutType of MixtureComes from the root hetero meaning differentEx: cookies, salsa, carpet
  • 8. Evaporation
  • 9. Filtration
  • 10. Distillation
  • 11. What is chemical change?A change in a substance that changes thecomposition of that substanceFlammability, reactivity, reaction with electricityare chemical propertiesChemical properties can be found usingflammability test, reactivity tests, electrolysis
  • 12. FlammabilityHow susceptible a substance is to fireCannot get original substance back after testChemical property test
  • 13. Signs of a Chemical ChangeColor changeFormation of a precipitateTemperature changeCreation of gas NOT A CHEMICAL CHANGE!!!