Insulation: Yr9

• What is the primary function of insulation?

  To control heat flow
• What does convection involve?

  Gas and liquid molecules heating up
• How does density change during convection?

  It changes as molecules heat up
• What is conduction?

  Heat movement through a material
• In which states of matter does conduction occur?

  Gas, liquid, and solid
• What is radiation in terms of heat transfer?

  Transfer of heat across space as energy
• In which environments can radiation occur?

  Gas, liquid, solid, and vacuum
• What is the difference between conduction and convection?

  Conduction is through materials, convection is through fluids
• How do convection and radiation differ in heat transfer mechanisms?

  Convection requires a medium, radiation does not
• What is conduction?


  Heat transfer through direct contact between objects, where molecules transfer energy by bumping into each other
• What is convection?


  Heat transfer in fluids (liquids and gases) where warmer, less dense parts rise and cooler, denser parts sink, creating circular currents
• What is radiation?


  Heat transfer through electromagnetic waves, like heat from the sun, which can move through space without needing a medium