Landform Studies Archives - Free ZIMSEC & Cambridge Revision Notes

People and Weathering

By garikaib|2017-01-17T11:22:06+02:00June 11th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Air pollution results in increased incidences of acid rain. Image credit airbetter.org

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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Limestone pavements

By garikaib|2017-01-17T11:22:07+02:00June 11th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Clints and grikes. Image credit nem.gov.uk.

Clints and grikes. Image credit nen.gov.uk. ZIMSEC O Level Geography Notes: Limestone pavements

Limestone pavements are flat areas of exposed limestone rocks.
They are part of the dissolved bedding plate which may have been exposed because the surface soil may have been removed by glacial activity […]
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Kopje, Tor and Balancing rocks

By garikaib|2017-01-17T11:22:08+02:00June 11th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

A Kopje. Image credit MediaWiki.

A Kopje. Image credit MediaWiki. ZIMSEC O Level Geography Notes: Landforms resulting from Weathering: Kopjes

Tors/Kopjes/Castle kopjes

Tors/kopjes/castle kopjes are inselbergs.
Tors the same as kopjes even though some books make an attempt to distinguish between the two.
Different names are applied in different localities to what are essentially […]
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Dwala/Ruware/Whaleback

By garikaib|2017-01-17T11:22:09+02:00June 10th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Dwala/Ruware. Image credit WordPress.com

Dwala/Ruware. Image credit WordPress.com ZIMSEC O Level Geography Notes: Landforms resulting from weathering: Dwala

Known as ruware in Shona, dwala in Ndebele (Nguni languages) and whaleback in English.
An example is Domboshava where several such landforms can be found.
It is a hill or rock which is dome shaped and rises several metres […]
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Landforms resulting from weathering

By garikaib|2017-01-17T11:22:10+02:00June 10th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Ruware/Dwala. Image credit WordPress.com

Ruware/Dwala. Image credit WordPress.com ZIMSEC O Level Geography Notes: Landforms resulting from weathering.

Weathering processes and usually in conjunction with other denudation processes such as water and wind erosion and mass wasting results in the formation of various landscapes.
In temperate and tropical latitudes these include:

1.Inselbergs/Monadnocks

The […]
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Factors affecting weathering

By garikaib|2017-01-17T11:22:11+02:00June 10th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Weathered Limestone rocks. Image credit konfuciuszintezet.hu

Weathered Limestone rocks. Image credit konfuciuszintezet.hu ZIMSEC O Level Geography Notes: Factors affecting weathering.

The rate and prvailing type of weathering at any given place is affected by:

Climate
Relief
Vegetation
Rock type

Climate

Weathering types are distrubuted according to the prevailing climate of given areas especially when considering.
Temperature and rainfall […]
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Physical weathering

By garikaib|2017-01-17T11:22:12+02:00June 10th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Exfoliation weathering. Image credit asergeev.com

Exfoliation weathering. Image credit asergeev.com ZIMSEC O Level Geography Notes: Physical Weathering

Physical weathering is the disintegration of a rock into smaller particles by mechanical processes and without any changes in the chemical composition of the rock.
It is more likely to occur in arid climates such […]
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Chemical weathering

By garikaib|2017-01-17T11:22:13+02:00June 9th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Chemical weathering in a desert environment. Image credit Diffen.com

Chemical weathering in a desert environment. Image credit Diffen.com ZIMSEC O Level Geography Notes: Main types of weathering: Chemical weathering

Chemical weathering is the breaking down or decomposition of rocks as a result of various chemical processes and reactions altering the chemical […]
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Weathering

By garikaib|2017-01-17T11:22:14+02:00June 9th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

A weathered boulder. Image credit earthlearningidea.

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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The effects of earthquakes

By garikaib|2017-01-17T11:22:15+02:00June 9th, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

A tsunami in Miyako Japan 2011/Image credit Ibtimes.

A tsunami in Miyako Japan 2011/Image credit Ibtimes. ZIMSEC O Level Geography Notes: The effects of Earthquakes.

Factors that may affect the impact of earthquakes.

Distance of concerned area from epicenter although you should take note of the factor below.
Coastal locations have a higher risk […]
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June 2015

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November 2020 O Level results are out