𝒽ℯ𝒶𝓉

• What word describes the transfer of heat energy through a solid?

  Conduction
• What word describes the transfer of heat through a gas or liquid?

  Convection
• What word describes the transfer of heat without matter?

  Radiation
• What happens to particles when heated?

  They vibrate faster and bump into others
• What word describes a substance that allows heat to travel through it easily?

  Conductor
• What word describes a substance that does not allow heat to travel through it easily?

  Insulator
• Give an example of two substances which are conductors?

  Metal, copper, steel, iron
• Give an example of two substances which are insulators?

  Air, plastic, wood
• Is air a good conductor of heat?

  No
• Why is air not a good conductor of heat?

  The particles in air are too far apart
• Is a wooden spoon a conductor or insulator?

  Insulator
• Is a copper pot a conductor or insulator?

  Conductor
• Describe four ways of reducing heat loss from a house.

  • Roof insulation
  • Double glazing
  • Wall insulation
  • Draught excluders
  • Carpets/underlay
• What do we call it when air above the heat source gets warm and rises, then cools and falls?

  Convection current
• Do silver shiny surfaces reflect or absorb heat?

  Reflect
• Give an example of where we paint something black or white to absorb or reflect heat.

  White houses in warm countries
• What colour of surface will absorb heat?

  Black
• What is another word for heat radiation (rays)?

  Infrared
• What do we call a heat picture made using infra-red radiation?

  Thermogram
• Give a use for thermograms.

  Detecting heat loss in buildings
• What piece of equipment do we use to measure temperature?

  Thermometer
• What units do we measure temperature in?

  Degrees Celsius