February 2025

Hydro-electric power

By |2025-02-12T09:27:38+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A hydro-electric power station. Image credit MediaWiki

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Hydro-electric power

  • At a hydro-electric power plant, water leaves the lake or reservoir at high pressure (speed) and goes through pen stocks (concrete or steel pipes) to the turbines in a power house underground.
  • The force of […]
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Africa’s Energy Resources

By |2025-02-12T08:58:20+02:00February 12th, 2025|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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Gold panning in Zimbabwe

By |2025-02-12T09:38:39+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Gold Panners. Image credit news.trust.org

ZIMSEC O Level Geography Notes: Natural Resources: Resource Exploitation: Gold panners in Zimbabwe

  • Zimbabwe has more than 800 000 gold panners who have invaded much of the central Highveld and areas along major rivers.
  • The number fluctuates seasonally but the sudden rise in number of the […]
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Zimbabwe’s Forest and Effects of population growth

By |2025-02-12T09:23:41+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Firewood as a fuel

ZIMSEC O Level Geography Notes: Forestry: Effects of population growth

  • 95% of people living in the rural area depend on wood as their source of fuel.
  • The urban population has access to electricity but due to the power shortages issues and load shedding wood fuel is still […]
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Sources of fresh water

By |2025-02-12T09:13:00+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

There are various sources of fresh water

ZIMSEC O Level Geography Notes: Natural Resources: Water: Sources of fresh water

  • Supplies of fresh water can be examined at a local level or at a national/international level.
  • Local supply sources at family or village level are usually small-scale, cheap schemes that can be […]
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Fish conservation

By |2025-02-12T09:08:36+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Police patrols can reduce fish poaching. Image credit flickr.com

ZIMSEC O Level Geography Notes: Natural Resources: Fishing:Fish conservation

  • The fishing industry in the SADC region can only be sustained if sustainable methods are employed.
  • The following methods of conservation have been put in place in the region.
  • Legislation has been enacted […]
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Energy:The siting and production of Hydro-electric power: Gorges

By |2025-02-12T09:27:59+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Kariba dam wall. Image credit Bloomberg.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:The siting and production of HEP 

  • Site refers to the actual ground on which something is happening.
  • The siting of a hydro-electric power station depends on a number of physical factors.

Gorge

  • A gorge is a deep narrow […]
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Advantages and Disadvantages of coal as a source of energy

By |2025-02-12T08:58:53+02:00February 12th, 2025|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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Case Study:Copper mining in Zambia

By |2025-02-12T09:38:48+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Kansanshi Copper mine in Zambia. Image credit apjjf.org

ZIMSEC O Level Geography Notes: Natural Resources: Case Study:Copper mining in Zambia

The Copper belt

  • The following are factors which have influenced the development of copper mining on the copper belt in Zambia:

Geological occurrence of copper

  • The copper deposits occur in an axial belt […]
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Effects of deforestation in rural areas

By |2025-02-12T09:24:09+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Deforestation also occurs around urban areas

ZIMSEC O Level Geography Notes: Natural Resources: Forestry:Effects of deforestation in rural areas

  • Deforestation is not limited to communal areas in Zimbabwe but also extends to commercial farming areas and even government protected woodlands.
  • People poach timber for sale in towns as firewood or to […]
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