1.  Electricity is a secondary energy source.

 2.  Generating electricity using carbon fuels makes carbon dioxide. True 

 3.  The stages in a power station are:

      Boiler - Turbine - Generator.

 4.  The energy changes at each stage in a power station that uses fossil fuels to produce electricity are:

      Boiler                         Turbine                    Generator                   
      Chemical to heat       Heat to Kinetic        Kinetic to electrical     
      Heat wasted                Heat wasted              Heat wasted

 5.  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).