Module 6 · Practice
Practice questions
Three difficulty levels.
Section A — Easy
Name three renewable energy resources and three non-renewable ones.
State the law of conservation of energy in your own words.
Match each transfer to its description: conduction / convection / radiation
Write the equation linking power, energy and time.
Explain the difference between heat and temperature in a sentence each.
Section B — Medium
A 1500W kettle is on for 2 minutes. Calculate the energy transferred (in joules).
An immersion heater transfers 90 000 J in 1 minute. Calculate its power in watts.
Why are saucepans usually made with a metal base but a plastic handle?
Explain in terms of energy stores what happens when a stretched catapult is released and fires a small stone.
A radiator is painted matt black instead of shiny silver. Suggest one reason this is a good design choice and one reason it might not be.
Section C — Hard
A house is heated by an electric fire rated at 2 kW. Electricity costs 30p per kWh. The fire is on for 5 hours.
Compare two energy sources for generating electricity: gas and wind. Give one advantage and one disadvantage of each.
Explain why a vacuum flask keeps a hot drink hot. Refer to all three types of heat transfer.
A pupil drops a ball from a height. Each bounce reaches a lower height than the last. Explain in terms of energy why this happens.