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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