O Level Geography Archives - Page 3 of 35 - Free ZIMSEC & Cambridge Revision Notes

Small scale energy sources and plants:Bio-fuel

By Rachel Majaya|2025-02-12T09:45:20+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Jatropha plant. Image credit jatropha.org.za

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Bio-fuel

is a fuel that is produced through contemporary biological processes,
such as agriculture and anaerobic digestion,
rather than a fuel produced by geological processes such as those involved in the formation of fossil […]

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Sunshine

By garikaib|2025-02-12T09:16:02+02:00February 12th, 2025|O Level Geography, Weather and Climate|

A sunshine recorder. Image by Rfuess-Mueller. ZIMSEC O Level Geography Notes: Sunshine

It has a glass sphere surrounded by a metal frame.
On the frame is attached a sensitive card.
The sphere focuses the sun’s rays onto the card.
As the sun moves across the sky it burns […]

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Weather Hazards

By garikaib|2025-02-12T08:59:03+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, Weather and Climate|

Floods are just one of many natural weather hazards. Image by The Australian. ZIMSEC O Level Geography Notes: Weather Hazards

Weather hazards are conditions which are unfavorable to people and their activities that result from weather phenomena.
There are […]

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Landforms resulting from intrusive vulcanicity

By garikaib|2025-02-12T09:39:56+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Some of the landforms resulting from intrusive vulcanicity. Image by Msnucleus.org ZIMSEC O Level Geography Notes: Landforms resulting form intrusive vulcanicity

Intrusive vulcanicity is the movement of gasses, magma and other materials into the earth’s curst to form interior volcanic […]

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People and Weathering

By garikaib|2025-02-12T09:27:03+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Air pollution results in increased incidences of acid rain. Image credit airbetter.org ZIMSEC O Level Geography Notes: People and weathering

How humans influence weather?

Human activities such as industrialisation and driving of cars produce emissions such as sulphur dioxide,nitric oxide […]

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Desertfication

By garikaib|2025-02-12T09:10:12+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Desertification in the arid parts of Kenya. image credit Rascona-of-the-week. ZIMSEC O Level Geography Notes: Desertification

The meaning of desertification

Desertification literary means the making of deserts and several definitions have been offered for the term all expressing this idea.
Desertification refers to […]

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Waterfalls and Rapids

By garikaib|2025-02-12T08:59:30+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The Victoria Falls formed by water falling into a faultline. Image credit trekearth.com ZIMSEC O Level Geography Notes: Waterfalls and Rapids

Waterfalls and Rapids

Waterfalls commonly occur in the upper course section of the river although they can occur […]

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Canoes and Dhows

By garikaib|2025-02-12T09:29:12+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Canoes are a popular way of transporting people in Venice. Image credit miriadna.com ZIMSEC O Level Geography Notes: Transport: Canoes and Dhows

They are cheap
clean
They are versatile as they can carry a variety of goods
They are simple to […]

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Hoyt’s Sector model (1939)

By garikaib|2025-02-12T09:01:18+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Hoyt's sector model. Image credit MediaWiki Hoyt’s sector model. Image credit MediaWiki ZIMSEC O Level Geography Notes: Settlements: Hoyt’s Sector model (1939)

It was published as an alternative to Burgess and Park’s concentric model
It was based on a study of 142 American cities.

Assumptions

In making the model Hoyt made some assumptions
The […]

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Population Distribution in Africa

By garikaib|2025-02-12T09:29:57+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

The burstling streets of Harare. Image credit herald.co.zw ZIMSEC O Level Geography Notes: Population:Population Distribution in Africa

The total area of Africa is 30.2 million square kilometers
As of 2013 it had a population of about 1.11 billion people accounting for 15% of the world’s […]

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February 2025