Heat, temperature, thermometric scales

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Heat, temperature, thermometric scales

  1. 1. 1 Heat and Temperature
  2. 2. Thermal Energy • Thermal energy a form of kinetic energy characterized by randomness of motion at the atomic and molecular levels. 2
  3. 3. Internal Energy •Internal energy is the grand total of all the particles that make an object. 3
  4. 4. Heat •Heat is energy in transfer between a system and its surroundings caused by temperature differences. 4
  5. 5. Heat •The transfer can occur in different ways. 5
  6. 6. 6 ? ? ? ?
  7. 7. 7
  8. 8. Conduction • Conduction occurs when two things at different temperatures touch each other and energy directly transfers from the material in the hotter object to the material in the colder object at the point of contact. 8
  9. 9. Conduction • During conduction, heat is transferred through the vibration of molecules in a substance. As something gets warmer, it begins to increase the vibration and movement of the molecules that it consists of. 9
  10. 10. Conduction •Heat transfer through solids. 10
  11. 11. 11
  12. 12. Why are most cooking pots and pans made up of metals? 12 Let’s check your knowledge!
  13. 13. Why are most pan and pot handles made up of plastic or wood? 13 Let’s check your knowledge!
  14. 14. Convection •Transfer of heat by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it. 14
  15. 15. Convection Current •Warm fluid rises, cold fluid sinks. 15
  16. 16. 16
  17. 17. 17
  18. 18. Check your knowledge! When there is a fire, why must you crawl on the ground? 18
  19. 19. Radiation •The transfer of heat by EM waves such as visible light, infrared and ultraviolet radiation. 19
  20. 20. Radiation •This heat transfer will occur even if there were nothing but vacuum between you and the source of heat.20
  21. 21. 21
  22. 22. 22
  23. 23. 23
  24. 24. 24
  25. 25. 25
  26. 26. 26
  27. 27. Temperature •Temperature refers to the measure of the kinetic energy of the particles or molecules in a substance. 27
  28. 28. Construct a concept map about heat and temperature using the following terms below: a.Thermal energy b.Heat (conduction, convection, radiation) c.Temperature 28
  29. 29. Construct a concept map about heat and temperature using the following terms below: e. Calorie f. Heat flow g. Hot to cold h. Internal energy 29
  30. 30. 30 Thermometric Scales
  31. 31. Thermometric Scales •Fahrenheit, Celsius and Kelvin. 31
  32. 32. Thermometric Scales 32
  33. 33. Thermometric Scales 33
  34. 34. Thermometric Scales 34
  35. 35. Thermometric Scales 35

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