2.4

• Metal


  Good conductor of energy, energy is transferred through it very quickly
• Conduction


  • Energy is transferred through particles colliding with other particles when they vibrate
  • Energy is not transferred very easily through materials like wood
  • Wood and many non-metals are poor conductors, they are insulators
• Insulators


  Materials that conduct energy very slowly
• Liquids


  Poor conductors
• Gases


  Don't conduct well because their particles are much further apart than the particles in a solid
• Heating soup in a pan

  1. All of the soup heats up, not just the layer in contact with the bottom of the saucepan

  2. This is called a convection current
• Convection also happens in gases