January 2023

Forestry: Introduction

By |2022-09-15T12:35:21+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Trees in a rainforest. Image credit wabash.edu

ZIMSEC O Level Geography Notes: Natural Resources: Renewable resources:Forestry Introduction

  • Trees are an important natural resources in mankind’s pursuit for long lasting (sustainable) economic development and a better quality of lives.
  • Trees are a renewable resource since people can engage in reforestation and afforestation […]
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Tropical Forest Case study:The Korup Project

By |2022-09-15T12:35:06+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

The Korup National Park. Image credit himalayaninstitute.org

ZIMSEC O Level Geography Notes: Case study:The Korup Project

  • This project is located in the south-western part of Cameroon, on the border with Nigeria.
  • The forest around this area is characterized by high rainfall and poor soils making it unsuitable for raising crops
  • The […]
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Fishing:Natural lakes

By |2022-09-15T12:34:50+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Inland water fishing in Zambia. Image credit mg.co.za

ZIMSEC O Level Geography Notes: Natural Resources: Fishing: Fishing:Natural lakes

  • Fresh water lakes are mainly found in Tanzania, Malawi and Zambia.
  • Zimbabwe does not have natural lakes, all are man-made.
  • Lake Tanganyika in Tanzania and Lake Malawi are the largest and deepest rift […]
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Fish conservation at sea level

By |2022-09-15T12:34:41+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Fish drying. Image credit irinnews.org

ZIMSEC O Level Geography Notes: Natural Resources:Fishing:Fish conservation at sea level

  • Sustainable use of fish resources is necessary in order to meet present and future needs.
  • The following have been adapted by SADC countries to ensure sustainability of the fishing industry.
  • Quota system. Countries like South […]
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Small scale energy sources and plants:Biogas plant

By |2022-09-15T12:34:34+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Biogas Digestor in rural Zimbabwe. Image credit climatetracker.org

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Biogas plant

  • To install a bio-gas plant, a pit is dug underground near to the kitchen the depth of which is determined by the size of the plant the family wants […]
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Folding

By |2022-09-15T12:44:32+02:00January 24th, 2023|Landform Studies, Notes, Ordinary Level Notes|

Simple Folding. Image by Pixshark. Simple Folding. Image by Pixshark. ZIMSEC O Level Geography: Folding

  • Tectonic movements are those movements that result from the earth’s internal forces.
  • When forces move horizontally towards one another they are known as compressional.
  • Rocks that make up the earth’s crust are subjected to these compressional forces in a […]
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Clouds

By |2022-09-15T12:44:56+02:00January 24th, 2023|O Level Geography, Weather and Climate|

Clouds. Image by ThirdScribe. Clouds. Image by ThirdScribe. ZIMSEC O Level Geography Notes: Clouds

Refers to the fraction of the sky obscured by clouds when observed from a particular location. Okta is the usual unit of measurement of the cloud cover. Sky conditions are estimated in terms of how many eighths of the […]

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Unintentional changes to weather

By |2022-09-15T12:44:41+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, Weather and Climate|

ZIMSEC O Level Geography Notes: People and Weather: Accidental Changes

Acid Rain

  • The smoke from burning fuels and chemical industries rises into the air and mixes with water vapour.
  • When the rain falls down it becomes acidic.
  • The acid rain is a weak acid made up of sulphuric and nitric acids.
  • Over, a long time (years for example), the rain […]
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Advantages of Rift Valleys and Block Mountains

By |2022-09-15T12:44:30+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Yosemite Mountains and Valley. Image by Mountainprofessor. 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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Kopje, Tor and Balancing rocks

By |2022-09-15T12:44:19+02:00January 24th, 2023|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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