February 2025

Rehabilitation of mine areas.

By |2025-02-12T09:01:33+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A rehabilitated Zinc mine in Australia. Image credit abc.net.au

ZIMSEC O Level Geography Notes: Natural Resources:Mining:Rehabilitation of mine areas

  • Land rehabilitation is the process of returning the land in a given area to some degree of its former state, after some process (industry, natural disasters, etc.) has resulted in its damage.

    • […]

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World forest resources:Tropical forests

By |2025-02-12T09:40:54+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

An aerial view of a tropical rainforest. Image credit MediaWiki

ZIMSEC O Level Geography Notes:World forest resources:Tropical forests

  • The world’s forests can be divided into three broad classes.
  • These are tropical, temperate deciduous forests and coniferous forests.

Tropical forests

  • These are lowland and low latitude luxuriant forests.
  • They comprise tropical rain forests […]
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Natural Resources: Water quality

By |2025-02-12T09:25:55+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Water Quality is important. Image credit goinggreenrecyclingnigeria.org

ZIMSEC O Level Geography Notes: Natural Resources: Water: Water quality

The quality of water can be improved by:

  • Improving water treatment techniques.
  • Improving sanitation at household level.
  • Treating sewage before discharging it in streams and rivers.
  • Recycling industrial waste.
  • Use of bio-degradable chemicals in the […]
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Sea fisheries found on the west coast of Southern Africa

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

Recreational fishing off the coast of Namibia. Image credit travelnewsnamibia.com

ZIMSEC O Level Geography Notes: Natural Resources: Fishing:Sea fisheries on the west coast of Southern Africa

  • Fisheries of the Benguela cold current system cover the area along the west coast of South Africa, Namibia and southern Angola.
  • The area on the […]
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Geothermal power: Locational factors

By |2025-02-12T09:35:41+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A geothermal station in Iceland. Image credit ucsusa.org

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Geothermal power locational factors

  • Geothermal power can only be generated in areas of active volcanicity.
  • These areas are known as geothermal hotspots.
  • These are zones where volcanic activity underground makes rocks hot and these rocks […]
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Advantages and Disadvantages of Hydroelectricity

By |2025-02-12T09:01:03+02:00February 12th, 2025|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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Temperature

By |2025-02-12T09:05:32+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Six's thermometer Six’s thermometer ZIMSEC O Level Geography Notes: Temperature

  • The daily maximum and minimum temperatures are measured using Six’s thermometer (pictured above).
  • It was invented by James Six a British scientist hence the name Six’s thermometer.
  • It is also known as the Maximum and Minimum thermometer.
  • It is housed in a Stevenson’s screen.
  • Diurnal […]
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Conservative zones/Transform faults

By |2025-02-12T09:19:46+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

A conservative margin. Image by Expediatearcade. A conservative margin. Image by Expediatearcade. ZIMSEC O Level Geography Notes: Plate Tectonics: Transform Zones

  • At constructive zones plates slide sideways past each other.
  • In opposite directions in a tear or shear fashion.
  • At these margins lithosphere (land/oceanic crust) is neither created nor destroyed
  • That is neither plate is […]
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Physical weathering

By |2025-02-12T09:15:03+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Exfoliation weathering. Image credit asergeev.com Exfoliation weathering. Image credit asergeev.com ZIMSEC O Level Geography Notes: Physical Weathering

  • Physical weathering is the disintegration of a rock into smaller particles by mechanical processes and without any changes in the chemical composition of the rock.
  • It is more likely to occur in arid climates such […]
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