1.  The stages in a coal-fired power station are:

      Boiler - Turbine - Generator - Step up transformer - National Grid.

 2.  The energy changes and the waste energy at each stage in a power station that uses fossil fuels 

      to produce electricity are:

      Boiler                         Turbine                    Generator                     Step - up transformer
      Chemical to heat       Heat to Kinetic        Kinetic to electrical      Electricity transferred
      Heat wasted                Heat wasted              Heat wasted                  Heat wasted

 3.  The non renewable energy resource that releases more energy per kilogram is uranium.

 4.  The efficiency of a power station can be increased by changing more energy from the fuel into

      electricity. This means reducing the amount of energy wasted (heat).