|Name three fossil fuels
|Coal, Oil and Gas.
|What is the process by which energy is produced in a nuclear power station ?
|What form of energy is stored in the water in the top reservoir of a pumped storage station ?
|Gravitational Potential energy
|Why is wave power likely to be less reliable than Tidal power ?
|There are always two tides a day (tides depend on gravitational pull of the sun and moon), but on a calm day there may not be many waves (waves depend on winds, which are unreliable)
|Why are large numbers of solar cells often joined to make a solar panel ?
|Each solar cell only produces a small amount of electricity.
|Why are only a few places in the world able to have geothermal power stations ?
|in many places in the world the hot rocks are too far below the surface to be used.
|What type of area would be most suitable for a wind farm ?
|A large, flat area of high ground.
|What is the difference between a renewable energy source and a non-renewable energy source ?
|A renewable energy source is produced as fast as it is used. A non-renewable energy source is one that is used at a much faster rate than it is produced.
|Which gas, released by the burning of coal, causes acid rain ?
|Give two advantages of overhead cables compared to underground cables ?
|Overhead cables are easier to repair and are cheaper.
|What sort of transformers are used at local sub-stations ?
|A step-down transformer
|Why does the demand for electricity vary between summer and winter ?
|The demand increases in winter because it gets colder so more electricity is used heating homes.
|In what form is energy stored in the top reservoir of a pumped storage scheme ?
|Gravitational Potential energy.