NOTES

• Energy generation

  A) hemical

  B) inetic

  C) lectrical

  
• Fracking:

  • Fracking involves drilling into layers of shale rock deep in the earth to release pockets of gas
• reasons for wind power:

  • low maintenance
  • Clean energy
  • Higher winter output
  • Low cost energy
• reasons against wind power:

  • Only work when windy
  • Eyesore to some
  • Hazard to birds
  • Noise
• Solar energy:

  • The Sun produces a constant stream of solar energy that reaches Earth
  • In just one hour it provides enough energy to power the world for one year
• Photovoltaic cells:

  • Light photons hit the PV cell which allows electrons to flow, creating an electric current
• Tidal energy:

  • The rise and fall of the tide forces water through turbines which drive generators to produce electricity
• Hydroelectric power (HEP):

  • Hydroelectric power is a very reliable and controllable energy source
  • The set-up costs are financially and environmentally expensive
  • Vast areas need to be flooded to create reservoirs
• Biofuel and biomass:

  • Biofuel and biomass are created from organic matter which is burned to generate power
  • Biomass fuels include food and farm waste, compost and wood chips or compressed pellets
• Nuclear power:

  • Nuclear power accounts for over 11% of the world’s electricity
  • non renewable
  • provides an abundant, reliable supply of clean energy