Power-line to transmit electrical energy

ZIMSEC O Level Geography Notes: Natural Resources:Energy

  • Energy is power.
  • It may exist in the form of potential or kinetic energy or in the form of fossil fuels and hydrocarbons.
  • It is also found in the form of light or heat energy.
  • Its sources cover all three states of matter, that is, solids, liquids and gases.
  • It is converted into usable forms in power plants.
  • These range from sophisticated nuclear fission, fusion power stations or hydro-electric and thermal power plants through to simpler home-based biogas plants.
  • Energy is required daily in households for cooking, lighting, heating and in the functioning of all domestic electrical appliances.
  • It is needed in driving machinery in our processing and manufacturing industries.
  • The transport industry also heavily relies on the availability and efficient supply of certain types of energy.
  • Per capita energy production and consumption is used to distinguish the quality of life between and among nations.
  • Per capita energy production and consumption is the annual electricity generated expressed in kilowatt-hours.
  • The difference between the amount of electricity generated or imported and the amount consumed or exported is accounted for as loss in transmission and distribution.
  • Each energy source has its own advantages and disadvantages.
  • These are in terms of accessibility, availability, efficiency, production costs and environmental impact.
  • Some issues have national and global effects which have forced nations singly or jointly to draw up energy policies.
  • Modern life depends on energy.

To access more topics go to the O Level Geography Notes page

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