Describe how useful energy may be obtained, or electrical power generated, from: (a) chemical energy stored in fossil fuels (b) chemical energy stored in biofuels (c) hydroelectric resources (d) solar radiation (e) nuclear fuel (f) geothermal resources (g) wind (h) tides (i) waves in the sea including references to a boiler, turbine and generator where they are used

Know that the Sun is a star of medium size, consisting mostly of hydrogen and helium, and that it radiates most of its energy in the infrared, visible and ultraviolet regions of the electromagnetic spectrum