O Level Geography Archives - Page 24 of 35 - Free ZIMSEC & Cambridge Revision Notes

Effects of mining on the environment

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

Gullying as a result of panning. Image credit Reuters

ZIMSEC O Level Geography Notes: Natural Resources Impact of mining on the environment

Deforestation and erosion as large areas are cleared when surface methods of mining are used.
Frequency of open quarries, trenches and pits may cause land degradation.
Infrastructure development which include the […]

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Uses,problems,solutions of commercial forests in Zimbabwe

By Rachel Majaya|2025-02-12T09:40:36+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Treated poles. Image credit wattle.co.zw

ZIMSEC O Level Geography Notes:Uses, problems and solutions of commercial forests

Commercial forests have different uses.
Some of which include:
1. The pine and eucalyptus are mainly used for construction purposes, furniture making as well as in the pulp and paper industry.
2. Treated eucalyptus poles are also […]

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Natural Resources: Water conservation

By Rachel Majaya|2025-02-12T09:25:37+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Conservation of water is important. Image credit voanews.com

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

Water conservation is the management of water resources in ways that prevent them from pollution.
It includes all the policies, strategies and activities made to sustainably manage the natural resource fresh water.
It also […]

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Sea fisheries found on the east coast of Southern Africa

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

Fishing on the Beira Coast in Mozambique. Image credit irinnews.org

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

The east coast of Southern Africa is washed by warm ocean currents, like the Mozambique current and the warm Agulhas current.
The area therefore […]

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Geothermal power: Introduction

By Rachel Majaya|2025-02-12T09:34:50+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Geothermal Power Station. Image credit MediaWiki

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

Geothermal power is generated using steam rhythmically shooting out from underground at high pressure in the form of geysers.
To control the movement of steam, an intricate network of pipes is installed collecting and directing the […]

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Advantages and Disadvantages of Solar energy

By Rachel Majaya|2025-02-12T09:00:48+02:00February 12th, 2025|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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Temperature

By garikaib|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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The rain-shadow effect

By garikaib|2025-02-12T09:26:09+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Sem-arid conditions in Save Valley are due to the Rain-shadow effect. Image by Youth Delegates ZIMSEC O Level Geography Notes: Rain Shadow Effect

We have already looked at the formation of relief rainfall elsewhere. The […]

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Conservative zones/Transform faults

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

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

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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February 2025