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Grade 6, Chapter 9

Grade 6, Chapter 9

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OLM Science6_9 Presentation Transcript

  • 1. Chapter 9 Heat & Heat Technology Temperature Section 1
  • 2. Temperature
    • Measure of the average kinetic energy of the particles in an object
  • 3. Kinetic Energy
    • The particle with the higher amount of kinetic energy will have the higher temperature
  • 4. Thermal Expansion
    • The increase of the volume of a substance due to an increase in temperature
  • 5. Fahrenheit Temperature Scale
    • Water boils 212 – Body Temp 98.6 Room Temp 68 - Water freezes 32
  • 6. Celsius Temperature Scale
    • Water boils 100 – Body Temp 37 Room Temp 20 - Water freezes 0
  • 7. Kelvin Scale
    • Water boils @ 373–Body Temp 310 Room Temp 293-Water freezes 273
  • 8. Absolute Zero
    • The lowest temperature on the Kelvin scale (k) is 0 K
  • 9. Thermal Expansion
    • Segments expand when temperature rises and contracts when the temperature drops
  • 10. Chapter 9 Heat & Heat Technology What is Heat? Section 2
  • 11. Heat
    • Transfer of energy between objects that are different temperatures
  • 12. Thermal Energy
    • The total kinetic energy of the particles that make up a substance
  • 13. Thermal Equilibrium
  • 14. Conduction
    • Transfer of thermal from one substance to another
  • 15. Conductors
    • Substances that conduct thermal energy
  • 16. Insulators
    • Substances that do not conduct thermal energy
  • 17. Convection
    • Transfer of thermal energy by movement of liquid or gas
  • 18. Radiation
    • Transfer of thermal energy through space
  • 19. Greenhouse Effect
  • 20. Specific Heat Capacity
    • Amount of energy need to change the temperature of a substance by 1 degree Celsius
  • 21. Calculating Heat
    • Energy transferred(J) = Specific heat capacity(J/kg X C) X mass (kg) X change in temperature (C)
    • J = (j/kg X C)X(kg)X(C)
  • 22. Calories & Kilocalories
    • Kilocalorie (kcal) is equal to 1,000 calories
    • Calories (with capital C) is equal to 1,000 calories
  • 23. Chapter 9 Heat & Heat Technology Matter Heat Section 3
  • 24. States of Matter
    • Physical forms in which a substance can exist
  • 25. Particles of Solid
    • Particles do not move fast enough to overcome the strong attraction between them
  • 26. Particles of Liquid
    • Move fast enough to overcome some of the attraction between them
  • 27. Particles of Gas
    • Move fast enough to overcome nearly all of the attraction between them
  • 28. Change of State
    • Conversion of a substance from one physical form to another
  • 29. Changes of State for Water
  • 30. Chemical Changes
    • Changes that occur when one or more substances are changed into entirely new substances
  • 31. Chapter 9 Heat & Heat Technology Heat Technology Section 4
  • 32. Steam Heating System
  • 33. Hot-Water Heating System
    • Water is heated then pumped through pipe work that leads to radiators in each room
  • 34. Warm Air Heating System
    • Air heated in a separate chamber in the furnace. Warm air travels through ducts to different rooms
  • 35. Insulation
    • Substance that reduces the transfer of thermal energy
  • 36. Solar Heating Systems
    • Passive – Do not have moving parts
    • Active Solar – Have moving parts
  • 37. Heat Energy
    • A machine that uses heat to do the work
  • 38. External Combustion Engine
    • Simple steam engine
  • 39. Internal Combustion Engine
    • Fuel is burned inside the engine
  • 40. Air Conditioner
    • Transfers thermal energy inside the building or car to an area outside
  • 41. How a Refrigerator Works
    • Compressor
  • 42. How a Refrigerator Works
    • Condenser Coils
  • 43. How a Refrigerator Works
    • Expansion Valve
  • 44. How a Refrigerator Works
    • Evaporating Coils
  • 45. Thermal Pollution
    • Excessive heating of a body of water