2/14/12

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2/14/12

  1. 1. 2/14 A/B DayLEQ: What physical properties of watermake it unique?1. What is susceptibility?2. What do we call a chemical that causes cancer?3. What disease would you predict someone tohave if his mother drank alcohol when she waspregnant?4. What is one benefit of using pesticides?5. What is one risk of using preservatives in ourfoods?
  2. 2. Our Progress This Year:Unit 1: Geologic EvolutionUnit 2: ChemistryUnit 3: HydrosphereUnit 4: Cells
  3. 3. WATER
  4. 4. Today’s LEQ: What physical properties of water make it unique?By the end of today, you should be able to…1. Describe buoyancy and surface tension2. Explain the special qualities relating to water’s density, specific heat, and solubility
  5. 5. Focus Vocabulary107. Surface Tension108. Buoyancy
  6. 6. Lab Procedures1.Do not write on class sets2.Follow all instructions every time3.All work goes in your notebook4.Teamwork5.Assign Partner numbers
  7. 7. Physical Properties of WaterDensitySolubilitySurfaceTensionBuoyancySpecificHeat
  8. 8. Colder water = denser water The “skin” that covers The upward water’s surface push of water molecules on a substance Water is the universal Water heats solvent! and cools very slowly!
  9. 9. Physical Properties of WaterDensity Colder water = denser waterSolubility Water is the universal solvent!Surface The “skin” that covers the surface of waterTension The upward push ofBuoyancy water molecules on a substanceSpecific Water heats and cools very slowly!Heat
  10. 10. Physical Properties of WaterDensity Colder water = denser waterSolubility Water is the universal solvent!Surface The “skin” that covers the surface of waterTension The upward push ofBuoyancy water molecules on a substanceSpecific Water heats and cools very slowly!Heat
  11. 11. WATER
  12. 12. Summarizer: In 4-6 sentences, write aparagraph to describe whatphysical properties of water make it unique!
  13. 13. WARMER WATERCOLDER WATER

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