June 2015

People and Weathering

By |2022-09-15T12:44:18+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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Dwala/Ruware/Whaleback

By |2022-09-15T12:44:20+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 |2022-09-15T12:44:21+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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Chemical weathering

By |2022-09-15T12:44:23+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 |2022-09-15T12:44:24+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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May 2015

The earth’s crust

By |2022-09-15T12:44:37+02:00May 31st, 2015|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

The structure of the Earth. Image by BBC.

The structure of the Earth. Image by BBC. ZIMSEC O Level Geography Notes: The Earth’s Crust
  • The earth is generally spherical in shape.
  • It’s surface however is made up of immeasurable valleys, mountains, rivers, hills etc of different shapes and sizes which in turn […]

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