Generating electricity

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  • Generating electricity
    • Fuel for electricity
      • Electricity generators in power stations are driven by turbines
      • Coal, oil and natural gas are burned in fossil fuels power stations
      • Uranium or Plutonium are used as the fuel in a nuclear power station. much more energy is released per KG from uranium or plutonium than from fossil fuels
      • Biofuels are renewable sources of energy. Biofuels such as methane and ethanol can be used to generate electricity
    • Energy from wind and water
      • A wind turbine is an electrical generator on top of a tall tower
      • Waves generate electricity by turning a floating generator
      • Hydroelectricity generators are turned by water running downhill
      • A tidal station traps each high tide and uses it to turn generators
    • Power from the sun and the earth
      • Solar cells are flat solid cells that convert solar energy directly into electricity
      • Solar heating panels use the sun's energy to heat water directly
      • Geothermal energy comes from the energy released by radioactive substances deep inside the earth
      • Water pumped into hot rocks underground produces stream to drive turbines that generate electricity
    • Energy and the enviroment
      • Fossil fuels produce increased levels of green house gases which could cause global warming
      • nuclear fuels produce radioactive waste
      • Renewable energy resources can affect palnt and animal life
    • Big energy issues
      • Gas-fired power stations and pumped-storage stations can meet variation in demand
      • Nuclear, coal and oil power stations can meet base-load demand
      • Nuclear power stations, fossil fuels power stations using carbon capture and renewable energy are all likely to contribute to future energy supplies

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