P1.4 Generating electricity

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  • P1.4 Generating electricity
    • Fuel for electricity
      • turbines drive generators
      • fossil fuel
        • coal
        • oil
        • gas
      • nuclear
        • uranium/ plutonium
        • more energy released than fossil fuels
      • biofuels
        • renewable
    • Energy from wind
      • turbine on top of tower
      • turns generator
    • Energy from water
      • hydroelectric
        • water falls downhill
      • wave
        • make floating generator move up and down
        • not constant supply
        • lots of cables
      • tidal
        • release high tide through turbines
    • Energy from the earth
      • Geothermal
        • energy released by radioactive substances
        • water pumped underground
    • Energy from the Sun
      • Solar cells
        • expensive
        • many are needed
        • heating panels heat water
    • Energy and the environment
      • fossil fuels produce greenhouse gases
      • nuclear fuels produce radioactive waste
      • renewable energy can affect plant and animal life
      • carbon capture
        • collecting carbon
    • The national grid
      • network of cables and transformers that distributes electricity to our homes
      • step up transformers
        • step up voltage
      • high voltage = less energy loss
      • 230 V

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