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The Nature Of Heat

The Nature Of Heat. Let's Review. Thermal Energy vs. Temperature. Temperature is a measure of the AVERAGE kinetic energy of all of the individual particles. Thermal energy is the TOTAL energy of all of the particles . The 3 temperature scales are: Fahrenheit, Celsius, and Kelvin.

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The Nature Of Heat

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  1. The Nature Of Heat

  2. Let's Review...

  3. Thermal Energy vs. Temperature • Temperature is a measure of the AVERAGE kinetic energy of all of the individual particles. • Thermal energy is the TOTAL energy of all of the particles. • The 3 temperature scales are: Fahrenheit, Celsius, and Kelvin.

  4. Specific Heat • Specific heat is the amount of energy required to raise the temperature of 1 kilogram of a substance by 1C. • Unit of measure is joules per kilogram-degree Celsius • This is why the sand at the beach is hotter on your feet than the water is!

  5. Heat • Heat is the TRANSFER of thermal energy • “Heat is thermal energy moving from a warmer object to a cooler object.” • Heat is transferred by CONDUCTION, CONVECTION, and RADIATION.

  6. Conduction • Conduction is the transfer of heat from one particle of matter to another withoutmovement of the matter itself. • In conduction – the objects must be TOUCHING! • Example: Metal spoon in a pot of water being heated on a stove

  7. Convection • In convection, heat is transferred by the MOVEMENT of currents within a fluid. • Examples: • Water boiling in a pot • Heating and Air Conditioning systems in a building • The flows created by the moving fluid creates a circular motion known as convection current.

  8. Radiation • Radiation is the transfer of energy by electromagnetic waves. • You can feel radiation from a distance. • Radiation DOES NOT require matter to transfer thermal energy. • Examples: Sun, Fire, light bulb

  9. Insulators • A material that does NOT allow heat to flow easily is an insulator. • Examples of good insulators: • Clothes • Wood, Paper • Air

  10. Conductors • A material that allows heat to flow EASILY is a conductor. • Examples of good conductors: • metals • water • human (as a whole)

  11. Use vocab terms to discuss what is happening here…

  12. Conductors & Insulators– how do they affect our lives? • Do an Internet search to find a valuable & well-used insulator or conductor (choose 1). • Using a reliable source (for example, from a university’s science department or government agency), type a 2 paragraph (8 sentence) explanation of the conductor/insulator and what its application is (for example, the industry that uses it). Include an image in your paper. • For extra credit, do a conductor AND an insulator

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