#P2.2.1
describe the main energy resources available for use on Earth (including fossil fuels, nuclear fuel, biofuel, wind, hydroelectricity, the tides and the Sun)
#P2.2.2
explain the differences between renewable and non-renewable energy resources
#P2.2.3
compare the ways in which the main energy resources are used to generate electricity
#P2.2.4
recall that the domestic supply in the UK is a.c., at 50 Hz and about 230 volts and explain the difference between direct and alternating voltage
#P2.2.5
recall that, in the National Grid, transformers are used to transfer electrical power at high voltages from power stations, to the network and then used again to transfer power at lower voltages in each locality for domestic use
#P2.2.6
recall the differences in function between the live, neutral and earth mains wires, and the potential differences between these wires; hence explain that a live wire may be dangerous even when a switch in a mains circuit is open, and explain the dangers of providing any connection between the live wire and any earthed object
#P2.2.7
explain patterns and trends in the use of energy resources in domestic contexts, workplace contexts, and national contexts