February 2025

Energy:Thermal power

By |2025-02-12T09:28:46+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Hwange Thermal Power Station. Image credit businessdaily.co.zw

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Thermal power

  • In thermal power production, fuel is used to heat water in huge boilers, converting this water into steam.
  • The steam at high pressure and through pipes, is directed to turbines.
  • The pressure turns the turbines […]
Read More
Comments Off on Energy:Thermal power

Advantages and Disadvantages of Natural gas as a source of energy

By |2025-02-12T08:59:51+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Natural gas flame

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Natural gas as a source of energy

 Advantages

  • Has a high energy output.
  • Cleaner and efficient.
  • Easy to mine and transport
  • Cheap
  • Can power vehicles.
  • Has other industrial uses.

Disadvantages

  • Environmentally unfriendly through pollution especially of air.
  • Very […]
Read More
Comments Off on Advantages and Disadvantages of Natural gas as a source of energy

Introduction to weather and climate

By |2025-02-12T08:59:57+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Rainy Weather. Image by Sodahead. Rainy Weather. Image by Sodahead. ZIMSEC O Level Geography Notes: Introduction to Weather and Climate

Weather-the state of the atmosphere at a particular place and time as regards heat, cloudiness, dryness, sunshine, wind, rain, etc. The weather is all around us, all the time. It is an […]

Read More
Comments Off on Introduction to weather and climate

Convergence and collision zones/plates

By |2025-02-12T09:16:29+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Convergence zone. Image by Coft.edu Convergence zone. Image by Coft.edu ZIMSEC O Level Geography Notes: Plate tectonics: Convergence Zone.

Convergence zone

  • Are also know as destructive plates (zones) or the zone of subduction.
  • This is when two plates move towards each other as shown on the diagram above.
  • An Ocean crust moves towards a […]
Read More
Comments Off on Convergence and collision zones/plates

Weathering

By |2025-02-12T09:10:34+02:00February 12th, 2025|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 […]
Read More
Comments Off on Weathering

Yardangs, Zeugens and Rock Pedestals

By |2025-02-12T08:56:37+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Zeugens. Image credit Revisionworld.com Zeugens. Image credit Revisionworld.com ZIMSEC O Level Geography Notes: Hot Deserts: Yardangs

Zeugens

  • Pictured in the diagram above.
  • Zeugens are the ridges in “ridge and furrow” landscapes found in deserts.
  • These ridge and furrow landscapes sculpted found in hot deserts are a result of wind erosion.
  • Wind abrasion turns a desert surface […]
Read More
Comments Off on Yardangs, Zeugens and Rock Pedestals

Landforms resulting form river processes

By |2025-02-12T09:32:44+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Rapids near Niagara Falls. Image credit NiagaraFallsLive.com Rapids near Niagara Falls. Image credit NiagaraFallsLive.com ZIMSEC Geography Notes: Landforms resulting from river processes

  • A river through its processes of erosion, transportation and deposition forms several landforms.
  • These can be broadly divided into those landforms resulting from erosion and deposition.

Landforms […]

Read More
Comments Off on Landforms resulting form river processes

River capture

By |2025-02-12T09:02:51+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River capture. River capture. ZIMSEC O Level Geography Notes: River capture

  • This is a process where one River captures the headwaters on a nearby stream.
  • This can occur due to several reasons viz:
  • Tectonic earth movements, where the slope of the land changes, and the stream is tipped out of its former course.
  • Natural damming, […]
Read More
Comments Off on River capture

Factors influencing the siting and location of settlements

By |2025-02-12T09:36:12+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A village of a hill image credit audleytravel.com A village of a hill image credit audleytravel.com ZIMSEC O Level Geography Notes: Population and Settlement:Factors influencing the siting and location of settlements

  • Several factors influence the location of settlements
  • These can be divided into four:
  • historical factors
  • accessibility
  • availability of resources; and
  • human preferences and available technology

Historical […]

Read More
Comments Off on Factors influencing the siting and location of settlements
Toggle Sliding Bar Area
Go to Top