erosion Archives - Free ZIMSEC & Cambridge Revision Notes

January 2023

Weathering

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

A weathered boulder. Image credit earthlearningidea. ZIMSEC O Level Geography Notes: Weathering

Earth movements (plate tectonics) create and lead to the development of the earth’s major landforms for example block mountains, volcanic cones, lava plateaus and rift valleys.
As soon as they are formed denudation processes […]

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Wind in deserts

By garikaib|2022-09-15T12:44:17+02:00January 24th, 2023|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

A sandstorm in a desert. Image credit annechia.com ZIMSEC O Level Geography Notes: Wind in Deserts

Wind is responsible for eroding, transporting and depositing materials in deserts.
To learn more go to Wind Action in Deserts.
Various landforms are formed by the above processes. […]

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River Erosion

By garikaib|2022-09-15T12:44:07+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River erosion. Image credit Internationalarchives.org ZIMSEC O Level Geography Notes: River Erosion

River erosion involves the wearing away of rock and soil found along the river bed and banks.
It also involves the breaking down of the rock particles being carried downstream by the river.
There are four […]

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Factors affecting erosion, transportation and deposition

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

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 [...]
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