Conduction, Convection and Radiation

• Conduction occurs in Solids

  Convection occurs in Liquids and Gases.

  Radiation occurs in empty space.
• CONDUCTION: Vibrating particles transfer energy to neighbouring particles.
• Metals have a high thermal conductivity.
• Plastics have a low thermal conductivity.
• CONVECTION: Where energetic particles move from hotter to cooler regions.
• In CONVECTION the fluid(liquid or gas) becomes less dense as the particles are being spread out because they are being heated.
• In CONVECTION if there is a constant heat source. There will be a CONVECTION CURRENT. As the now cool particles will be hot again and cool again.
• Thermal Conductivity is how well a material conducts energy.
• Convection currents occur in limited space.