O Level Geography

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March 2017

Advantages and Disadvantages of wood as a source of energy

By |2017-03-29T09:00:03+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Burning wood. Image credit villagenews.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of wood/crop residue/cow dung  as a source of energy

Advantages

  • Renewable energy sources.
  • Cheap or free in rural areas.
  • Easily accessible where forests or woodlands/crops/animals exist.
  • Tsotso stoves conserve live trees.
  • Technology very cheap and readily […]

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Advantages and Disadvantages of Hydroelectricity

By |2017-03-29T08:53:45+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

A micro-hydroelectric power station. Image credit abc.net.au

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Hydroelectricity

Advantages

  • Renewable energy source.
  • Cheap to maintain as water-transports itself to plants.
  • Very clean energy source.
  • Easy to use.
  • Very versatile, that is many uses.
  • Large lakes are multi-purpose can also be […]

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Advantages and Disadvantages of Solar energy

By |2017-03-29T08:45:18+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Solar Power Plant. Image credit sma-america.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Advantages and Disadvantages of Solar energy

 Advantages

  • Renewable energy source.
  • Plentiful and inexhaustible.
  • Very clean.
  • Relatively cheap.
  • Can power vehicles.
  • Suitable even in remote areas.
  • High energy output.
  • No pollutions associated with it.

Disadvantages

  • Expensive for poor rural communities.
  • Affected […]

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Advantages and Disadvantages of Nuclear power as a source of energy

By |2017-03-29T08:40:01+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Nuclear Power Plant. Image credit drug-alcoholtesting.co.uk

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Nuclear power as a source of energy

Advantages

  • Very long lifespan as half-life of most radioactive substances is about 4 000 years.
  • Has very high energy output.
  • Very efficient energy source.
  • Relatively clean if […]

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Advantages and Disadvantages of Natural gas as a source of energy

By |2017-03-29T08:35:21+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Natural gas flame

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Natural gas as a source of energy

 Advantages

  • Has a high energy output.
  • Cleaner and efficient.
  • Easy to mine and transport
  • Cheap
  • Can power vehicles.
  • Has other industrial uses.

Disadvantages

  • Environmentally unfriendly through pollution especially of air.
  • Very […]

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Advantages and Disadvantages of Oil/Petroleum as a source of energy

By |2017-07-29T10:50:02+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Natural gas as a source of energy

Advantages

  • Has high energy output, an efficient energy source.
  • Relatively cleaner compared with coal.
  • Easy to mine if land-based oilfields.
  • Easy to transport through pipelines.
  • Can be used to power vehicles
  • Relatively cheap.
  • Has a lot of other industrial uses.

Disadvantages

  • Environmentally […]

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Advantages and Disadvantages of coal as a source of energy

By |2017-03-29T08:36:14+02:00March 29th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Burning coal

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Advantages and Disadvantages of coal as a source of energy

 Advantages

  • Relatively high energy amount.
  • Fairly plentiful with global estimate use of 4 000 years.
  • Employment creation in mining, processing, burning and distribution.
  • Has many other industrial uses.
  • Relatively cheap energy source.

Disadvantages

  • Non-renewable […]

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Africa’s Energy Resources

By |2017-03-27T09:36:52+02:00March 27th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Old Inga Dam DRC. Image credit internationalrivers.org

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Energy resources of Africa

  • Electricity is generated from two major processes, thermal and hydro.
  • The thermal component includes petroleum on top of coal for a number of countries such as Egypt, Algeria, Nigeria and Libya.
  • For other […]

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Possible measures to solve the energy crisis in Zimbabwe

By |2017-03-27T09:30:16+02:00March 27th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Cahora Bassa Dama Mozambique.Image credit zambezitraveller.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:The energy crisis in Zimbabwe:Measures

Measures have been put in place to try to resolve the energy crisis in Zimbabwe. These include:

  • Imports of electricity from countries overproducing it for example from South Africa through the Insukamini interconnector near […]

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The energy crisis in Zimbabwe

By |2017-03-27T09:13:08+02:00March 27th, 2017|Notes, O Level Geography, Ordinary Level Notes|

Polling Stations in the Dark. Image credit mg.co.za

ZIMSEC O Level Geography Notes: Natural Resources: Energy:The energy crisis in Zimbabwe 

The energy crisis in Zimbabwe is demonstrated through the following:

  • Frequent shortages of petroleum and its products resulting in long queues for the scarce commodity at service stations.
  • Fluctuating prices in the […]

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