12.1
Energy in food
Food labels in kilojoules, per 100 g and per portion, using the energy, and measuring it by burning food.
12.2
Power and energy
Power ratings in watts and kilowatts, energy = power × time, and the kilowatt-hour.
12.3
Paying for energy
Meter readings, working out the cost, what a bill adds, and saving energy at home.
12.4
Energy resources
Fossil fuels and nuclear, how a power station works, renewable resources, and how Britain makes its electricity.
Daily 5
Five quick diagram questions a day from this unit. The ones you get wrong come back sooner. Progress saves in this browser.
What this unit covers
Mapped to the KS3 national curriculum (Physics: calculation of fuel uses and costs in the domestic context).
| Programme of study | Lesson |
|---|---|
| comparing energy values of different foods (from labels) (kJ) | 12.1 |
| comparing power ratings of appliances in watts (W, kW) | 12.2 |
| comparing amounts of energy transferred (J, kJ, kW hour) | 12.1, 12.2, 12.3 |
| domestic fuel bills, fuel use and costs | 12.3 |
| fuels and energy resources | 12.4 |
Next at GCSE