energy (1)

• kinetic energy 


  the store of energy of a moving object
• elastic potential 


  the type of energy stored in a spring when its stretched
• gravitational potential energy


  the energy stored in an object as the result of its position within Earth's gravitational field.
• specific heat capacity


  the energy required to raise the temperature of 1kg of a substance by 1degree
• power


  the rate at which energy is transferred or the rate at which work is done
• the conservation of energy 


  Energy can be transferred usefully, stored or dissipated but cannot be created or destroyed.
• reducing energy waste 


  lubrication - oil in a motor , thermal insulation - double glazing on windows
• thermal conductivity 


  a measure of how well a material conducts energy when it is heated
• efficiency 


  the ratio of the useful work done to the energy supplied to it
• how to increase efficiency

  reducing waste output, recycling waste output
• non-renewable energy sources 


  fossil fuels, nuclear fuel
• renewable energy sources


  wind, solar, geothermal, tidal
• renewable energy


  energy that can be replenished as it is used
• non-renewable energy sources


  energy that can not be replenished at it has been used and will eventually run out
• why is renewable energy not the most reliable 


  solar won't work in bad weather, if its a calm day wind wont generate enough to meet demand
• main energy uses


  transport , electricity generation , heating
• environmental impact of extraction of energy


  fossil fuels involve destroying landscapes, wind turbines can be considered an eyesore
• environmental positives and negatives of using the energy sources


  fossil fuels release harmful emissions, solar and wind directly create electricity with no emissions
• patterns of energy use 


  during Industrial Revolution, fossil fuels became an important source of energy as it was easy to mine and provided large amounts of energy, recently renewable energy has become more suitable as technology has been able to harness such energy sources efficiently. and it is easier to use these energy resources to meet publics growing demand but not to solve environmental issues.