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Unit c  - 2.2 heat vs temperature
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Unit c - 2.2 heat vs temperature

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  • 1. 2.2 Heat and Temperature
  • 2. What is Temperature Really?• It is all around us – when we wake up in the morning, in the classroom, outside, and it goes on ▫ Ex. Weather Channel• We use many different tools to measure temperature.
  • 3. Thermometer• Many different kinds and uses…main examples:  Weather outside  Body temperature• Here are some commonly used ones today:
  • 4. Galileo’s Thermometer• glass vials float to the top or sink to bottom of tube based on temperature of water in tube
  • 5. Mercury Thermometer• The liquid in the tubes goes up and down based on temperature
  • 6. Infrared Thermometer• Measures body temperature of a person using a little tip inserted into the ear
  • 7. Heat Energy and Temperature• Heat energy transfers from HOT substances to COLD ones….Always.• When we take the temperature of anything we are measure the amount of heat energy.• The higher the heat energy the higher the temperature• Ex. Temperature on a winter day
  • 8. Kinetic Energy and Thermal Energy• Kinetic – Amount of movement of the particles  Higher temperature more kinetic energy• Thermal – Total amount of kinetic energy caused by all particle movement
  • 9. Heat• Energy that transfers from one substance to another• Ex. Water being boiled to make tea  Heat is being transferred to make the water hotter• Ex. Chocolate being melted on the stove  Heat from stove is transferred to the colder chocolate
  • 10. • When 40C water mixes with 60C water the result is…………50C water!!! HEAT TRANSFER
  • 11. Heat Transfer• When two substances transfer heat without any electronic assistance they will warm up/ cool down equally.• Ex. 40C water mixed with 60C water = 50C water ▫ 40C + 10C = 50 60C – 10C = 50C ▫ BOTH GAIN/LOSE 10C of temperature
  • 12. Difference Between Them• Thermal Energy – TOTAL kinetic energy• Heat – the energy that transfers from a particles with higher movement to lower movement (kinetic energy)• Temperature is just a measurement of kinetic energy (hot or cold)
  • 13. • This leads us to the next section of Conduction, Convection, and Radiation. ▫ We will be building our own thermoses to protect and ice cube from heat ▫ More details to come!!!