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6. Heat radiation is that transfer of heat energy by...

  • Friction
  • Infrared radiation
  • Convection
  • Conduction

7. Conduction and convection involve the transfer of energy by...

  • Particles
  • Particulates
  • Heating
  • Emitting heat

8. An object that's hotter than its surroundings emits more radiation than it absorbs so it is....

  • Neutralises
  • Cools down
  • Heats up

9. Infrared radiation can be emitted by...

  • Liquids
  • Solids
  • Gases
  • Solids, liquids and gases
  • Gases and liquids
  • Solids and liquids
  • Solids and gases

10. Heat energy can be transferred by which three processes?

  • Currents, radiation and friction
  • Friction, radiation and electricity
  • Radiation, conduction, convection
  • Currents, radiation and electricity