January 2023

Air Masses

By |2022-09-15T12:45:09+02:00January 24th, 2023|O Level Geography|

World Winds and Pressure Systems. Image by World Winds and Pressure Systems. Image by Wikipedia Air masses

Air Masses

  • An air mass is a large body of air, whose properties – temperature, humidity (air moisture) and lapse rate – are largely uniform (the same) over an area several hundred kilometers across.
  • The regions […]
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The theory of continental drift

By |2022-09-15T12:44:36+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Evedence for the continental drift. Image by Wiki Commons. Evidence for the continental drift. Image by Wiki Commons. ZIMSEC O Level Geography Notes: The theory of continental drift

  • The theory of or idea that present day continents were once one single continent.
  • Continental drifts refers to the movement of continents.
  • The theory says that […]
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Earthquakes and their causes

By |2022-09-15T12:44:25+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Destruction wreaked by an earthquake. Image credit Telegraph.co.uk Destruction wreaked by an earthquake. Image credit Telegraph.co.uk ZIMSEC O Level Geography Notes: Earthquakes and their causes

  • An earthquake is a shaking, vibration, trembling or movement in the earth’s crust.
  • They are caused by one tectonic plate sliding over or past another plate along […]
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Factors affecting erosion, transportation and deposition

By |2022-09-15T12:44:05+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Laminar Flow. Image credit gjhikes.com Laminar Flow. Image credit gjhikes.com ZIMSEC O Level Geography Notes

  • The following factors affect the river’s energy and ability to erode, transport and deposit its load.
  • Type of flow, gradient of channel, volume/discharge, cross-sectional channel shape, channel roughness.

Type of flow Laminar and Turbulent [...] </p srcset=

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Pipelines

By |2022-09-15T12:41:08+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Pipeline under construction. Image credit MediaWiki Pipeline under construction. Image credit MediaWiki ZIMSEC O Level Geography Notes: Transport: Pipeline

Advantages

  • They are very efficient
  • They are cheap once the installation has been completed.
  • They can carry fluids in bulk.

Disadvantages

  • They are immobile i.e the route cannot be changed once they are installed.
  • Can only carry fluids […]
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Possible solutions to Urbanisation problems

By |2022-09-15T12:40:47+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Murambinda Growth Point. Image credit newsday.co.zw Murambinda Growth Point. Image credit newsday.co.zw ZIMSEC O Level Geography Notes: Settlements:Possible solutions to Urbanisation problems

  • Most LEDCs such as Zimbabwe struggle with urbanisation problems
  • This is because most countries cannot cope with the rapid rate of urbanisation
  • as the rate of industrialization and economic growth is […]
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Causes of Rapid Population change and the effects of rapid population change

By |2022-09-15T12:37:12+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Hopely Farm settlement

ZIMSEC O Level Geography Notes: Population: Causes of Rapid Population change and the effects of rapid population change

  • Improvement in the basic health care which has a lowered the death rate
  • Cultural factors for example, the desire to have a male child factor in the patriarchal societies
  • Need for […]
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