February 2025

Small scale energy sources and plants:Solar energy

By |2025-02-12T09:44:50+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A Photo-voltaic power plant. Image credit oorjasolar.com

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

  • Solar energy is converted into electrical energy in two ways
  • The first is through the use of solar panels
  • These are also known as photo voltaic power plants for reasons […]
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Wind direction and speed

By |2025-02-12T09:14:35+02:00February 12th, 2025|O Level Geography, Weather and Climate|

A cup anemometer and windvane. Image by Noaa.gov. A cup anemometer and windvane. Image by Noaa.gov. ZIMSEC O Level Geography Notes: Wind direction and speed.

Wind is the movement of air across the earth’s surface due to differences in pressure between two regions. Air moves from high pressure regions to low […]

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Vulcanicity

By |2025-02-12T09:37:43+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Violent volcanic eruption. Image by Dailymail. Violent volcanic eruption. Image via Dailymail. ZIMSEC O Level Geography Notes: Vulcanicity

  • Vulcanicity refers to all the various way by which molten rock and gasses are forced into the earths and onto its surface.
  • It includes volcanic eruptions which lead to the formation of volcanoes, lava plateaus and geysers.
  • It […]
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Transport: Bicycles, carts and Rickshaws

By |2025-02-12T09:27:54+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A rickshaw. Image credit MediaWiki A rickshaw. Image credit MediaWiki ZIMSEC O Level Geography Notes: Transport: Draught Power

Advantages

  • cheap
  • clean
    versatile
  • simple and available technology which makes them easy to manufacture and repair
  • Usually they do not require route permits

Disadvantages

  • They only carry a limited amount of goods/people
  • Can cause traffic congestion or make it worse.
  • They can […]
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The concentric model/Burgess’s model (1924)

By |2025-02-12T08:59:41+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

The Concentric Model. Image credit edublogs.org The Concentric Model. Image credit edublogs.org ZIMSEC O Level Geography Notes: Settlements: The concentric model/Burgess’s model (1924)

  • This is known alternatively as the concentric model, the ring model for urban land use or Burgess’ model.
  • It was formulated by Burgess and Park in 1924 after their […]
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