Thermal energy and its transfer Quiz
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5 questions, one answer each
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1. Why does a metal spoon in hot soup become hot at the handle?
- A. Particles pass on vibrations by conduction, and metals do this well
- B. Hot soup rises up the spoon
- C. Infrared radiation travels along the spoon
- D. The spoon gains mass
2. Which way of transferring energy can travel through a vacuum?
- A. Conduction
- B. Convection
- C. Radiation
- D. None of them
3. How much energy is needed to heat 3.0 kg of water by 5.0 °C? (c = 4200 J/kg °C)
- A. 15 J
- B. 63 000 J
- C. 12 600 J
- D. 630 J
4. Which surface will lose thermal energy by radiation fastest?
- A. Shiny silver
- B. Shiny white
- C. Matt black
- D. Shiny gold
5. Why does warm air rise above a radiator?
- A. It is less dense than the cooler air around it
- B. It is heavier than cold air
- C. It conducts energy upwards
- D. Radiation pushes it up