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Science powerpoint 10:30:12

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Science powerpoint 10:30:12

  1. 1. Science Powerpoint Madeleine Dodge
  2. 2. MATTER
  3. 3. Scientists classify things by theircompositionMixtures, elements, compounds
  4. 4. How to classify???? Can separate physically? = MixtureCan separate chemically? = Pure Substance
  5. 5. Mixturest wo or more substancesnot chemically combinedretain characteristic properties
  6. 6. Types of Mixtures:HomogeneousHeterogenous
  7. 7. Homogenousappears the same throughout“well mixed”the particles that make up the mixtureare very small and hard to recognize
  8. 8. Heterogenousdoes not appear the same throughoutthe particles in the mixture are largeenough to be seen and separated fromthe mixtureno specific proportion
  9. 9. Types of Pure SubstancesCompoundsElements
  10. 10. Elementsmade of atomsatoms in the same elements are alikeatoms in different elements are not
  11. 11. Compoundsmade from more than one elementcan be broken down into simplersubstances
  12. 12. SEPARATIONTECHNIQUES
  13. 13. Distillationa process that separates the substancesin a solution based on their boilingpoints
  14. 14. #1 B U #2 F Ftemp (c˚) E R plateau plateau time (mins)
  15. 15. Filtrationa process that separates materialsbased on the size of particles and/orsolubility
  16. 16. solid isolatedfunnel w/ filter paper filtrate
  17. 17. Evaporationa process used to isolate a solid dissolvedin a liquid property: solubility
  18. 18. NaCl: sodium chloride water
  19. 19. CHEMICALPROPERTIES
  20. 20. What is a chemical property?
  21. 21. Any ability to produce a change in thecomposition of matterChemical properties can be obser vedonly when the substances in a sample ormatter are changing into differentsubstances.
  22. 22. Flammabilitya material’s ability to burn in thepresence of oxygen.
  23. 23. Flammabilitya material’s ability to burn in thepresence of oxygen.
  24. 24. Flammabilitya material’s ability to burn in thepresence of oxygen.
  25. 25. Flammabilitya material’s ability to burn in thepresence of oxygen.
  26. 26. Reactivityhow readily a substance combineschemically with other substances
  27. 27. What is a chemical change?
  28. 28. when a substance reacts and forms oneor more new substanceschange in colorproduction of a gasformation of a precipitatechange in temperature
  29. 29. Review Questions
  30. 30. How could you use physical properties to separate mixtures?
  31. 31. What is are the differences bet ween a solution, suspension, and colloid?
  32. 32. What is a physical property?
  33. 33. What is an example of a chemicalseparation technique that we talked about?
  34. 34. What is a chemical change?

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