January 2023

Convergence and collision zones/plates

By |2022-09-15T12:44:35+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Convergence zone. Image by Coft.edu Convergence zone. Image by Coft.edu ZIMSEC O Level Geography Notes: Plate tectonics: Convergence Zone.

Convergence zone

  • Are also know as destructive plates (zones) or the zone of subduction.
  • This is when two plates move towards each other as shown on the diagram above.
  • An Ocean crust moves towards a […]
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Yardangs, Zeugens and Rock Pedestals

By |2022-09-15T12:44:14+02:00January 24th, 2023|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Zeugens. Image credit Revisionworld.com Zeugens. Image credit Revisionworld.com ZIMSEC O Level Geography Notes: Hot Deserts: Yardangs

Zeugens

  • Pictured in the diagram above.
  • Zeugens are the ridges in “ridge and furrow” landscapes found in deserts.
  • These ridge and furrow landscapes sculpted found in hot deserts are a result of wind erosion.
  • Wind abrasion turns a desert surface […]
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Landforms resulting form river processes

By |2022-09-15T12:44:03+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Rapids near Niagara Falls. Image credit NiagaraFallsLive.com Rapids near Niagara Falls. Image credit NiagaraFallsLive.com ZIMSEC Geography Notes: Landforms resulting from river processes

  • A river through its processes of erosion, transportation and deposition forms several landforms.
  • These can be broadly divided into those landforms resulting from erosion and deposition.

Landforms […]

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River capture

By |2022-09-15T12:43:39+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River capture. River capture. ZIMSEC O Level Geography Notes: River capture

  • This is a process where one River captures the headwaters on a nearby stream.
  • This can occur due to several reasons viz:
  • Tectonic earth movements, where the slope of the land changes, and the stream is tipped out of its former course.
  • Natural damming, […]
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Factors influencing the siting and location of settlements

By |2022-09-15T12:41:07+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

A village of a hill image credit audleytravel.com A village of a hill image credit audleytravel.com ZIMSEC O Level Geography Notes: Population and Settlement:Factors influencing the siting and location of settlements

  • Several factors influence the location of settlements
  • These can be divided into four:
  • historical factors
  • accessibility
  • availability of resources; and
  • human preferences and available technology

Historical […]

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Introduction and importance of population studies

By |2022-09-15T12:40:46+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

A child holding a clinic card. Image credit BBC A child holding a clinic card. Image credit BBC ZIMSEC O Level Geography Notes: Population:Introduction and importance of population studies

  • Population studies is the scientific study of human populations
  • It entails the study of:
  1. population numbers
  2. Their growth and decline
  3. deaths
  4. births

    5. […]

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Population structure

By |2022-09-15T12:37:11+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes: Population: Population structure

  • The population structure of a country describes the population’s age, sex and the period males and females are expected to live
  • Population structure is the composition of a given population, which is broken down into categories such as age and gender.
  • This information can be shown on a population […]
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