o level geography Archives - Free ZIMSEC & Cambridge Revision Notes

Terms used in Population studies

ZIMSEC O Level Geography Notes:Population Studies:Terms used in Population studies

Birth Rate (or crude birth rate) is the number of live births per 1,000 of the population in a given year. (Not to be confused with the growth rate).
Brain Drain is the emigration of a significant proportion of a country’s highly […]

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Small scale irrigation. Image credit wfp.org

ZIMSEC O Level Geography Notes:Agriculture:Farming types in Africa:Irrigation Farming

This is the artificial application of water on land in order to grow crops when prevailing climatic and weather conditions cannot sustain such crop growth.
This expensive farming system is carried out in order to:
1. Increase […]

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ZIMSEC O Level Geography Notes: People and Weather: Accidental Changes

Acid Rain

The smoke from burning fuels and chemical industries rises into the air and mixes with water vapour.
When the rain falls down it becomes acidic.
The acid rain is a weak acid made up of sulphuric and nitric acids.
Over, a long time (years for example), the rain […]

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By garikaib|2025-02-12T09:31:13+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography|

The Great African Rift Valley. Image by Mamonthsafaris. ZIMSEC O Level Geography Notes: Landfroms resulting from faulting.

Major landforms that result from faulting include:

1. Block Mountains The formation of block-mountains (Horst). Image by WikiComons

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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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