o level geography notes Archives - Page 2 of 7 - Free ZIMSEC & Cambridge Revision Notes

Wind Action: Wind Erosion

By garikaib|2025-02-12T09:35:25+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Wind carved flints stones in a desert. Image credit asergeev.com ZIMSEC O Level Geography Notes: Wind Action in Deserts

Wind is a process where the wind detaches soil particles from the land surface and transports them by its force.
It occurs when […]

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Pot Holes

By garikaib|2025-02-12T09:36:01+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Potholes. Image credit thunderbolts.info Potholes. Image credit coolgeography.co.uk ZIMSEC O Level Geography Notes: Landforms resulting form Potholes

These are circular holes bored into the solid bedrock of a river by pebbles and stones carried by the river.
The rough river bed, mostly common in the upper course section or rivers, encourages turbulent […]

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Land and sea breeze pressure system

By garikaib|2025-02-12T09:20:34+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Land and Sea breezes occur along coastal areas such as beaches. Image by Livescience. ZIMSEC O Level Geography Notes:Land and Sea breezes

As the name clearly suggests these breezes occur along coastal areas or along large lakes […]

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Faulting

By garikaib|2025-02-12T09:28:52+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography|

Common types of faults. Image via Noaa.gov ZIMSEC O Level Geography Notes: Faulting.

Lateral earth movements often produce very great stresses due to compressional forces (when plates move towards one another) and tensional forces (pulling apart).
These forces can cause fractures or breaks in the earth’s crust.
When breaks […]

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Wind Action in Deserts: Wind Transport and Deposition

By garikaib|2025-02-12T09:38:25+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Wind transportation methods. Image credit apod.com ZIMSEC O Level Geography Notes: Wind Action in Deserts: Wind Transport

Wind is able to transport (move) sand and dust particles depending on its speed and flow.
The effectiveness of wind erosion and transport depend on a number of factors:
Aeolian […]

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Ox-bow lakes

By garikaib|2025-02-12T09:45:54+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Ox-bow lake. Image credit airphotona.com ZIMSEC O Level Geography Notes: Ox-bow lakes

An oxbow lake is a U-shaped body of water that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water.
This landform is […]

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Depressions

By garikaib|2025-02-12T09:22:22+02:00February 12th, 2025|O Level Geography, Weather and Climate|

The characteristics and weather pattern associated with a depression. Image by the BBC. ZIMSEC O Level Geography Notes.

Characteristics

This is an area of low pressure whose shape on a map is oval or circular.
It is represented […]

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Advantages of Rift Valleys and Block Mountains

By garikaib|2025-02-12T09:36:35+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Yosemite Mountains and Valley. Image by Mountainprofessor. ZIMSEC O Level Geography Notes: Advantages of Rift Valleys and Block Mountains

Advantages of block mountains

Relief rainfall is common raising the amount of annual precipitation within the vicinity of such mountains.
They have a cooler environments which invigorating tends to […]

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Deflation Hollows

By garikaib|2025-02-12T09:40:09+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Deflation Hollow. Image via Imgkid ZIMSEC O Level Geography Notes: Deflation Hollows

Are also known as closed hollows or blowouts.
These are enclosed depressions caused by wind erosion.
In deserts the wind erodes loose material from flat areas which have, uncemented sediments such as those occurring in […]

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