Conduction, Convection and Radiation

• Conduction - the only heat transfer in solids
• Conduction - the movement of energy within the particles; the substance itself does not move
• In conduction, heat energy from the hotter end of the object goes to the cooler end
• Convection - the main heat transfer in liquids and gases (fluids)
• Convection - hot particles rise, cold particles sink
• In convection, the hot particles rise because they are less dense. The cold particles sink because they are denser. Eventually the hot particles will cool down and sink to the bottom, and new, hotter particles will take its place.

  This is called the convection current.
• Radiation - heat energy is being transferred without particles through the use of empty space/vacuum
• Radiation - heat energy is being transferred via electromagnetic radiation that involves waves
• SURFACE: Matte/Rough/Dull

  ABSORPTION: Good

  EMISSION: Good

  REFLECTION: Bad
• SURFACE: Shiny

  ABSORPTION: Bad

  EMISSION: Bad

  REFLECTION: Good