O Level Geography Archives - Page 31 of 35 - Free ZIMSEC & Cambridge Revision Notes

Advantages and Disadvantages of Natural gas as a source of energy

By Rachel Majaya|2022-09-15T12:34:23+02:00January 24th, 2023|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 […]

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Introduction to weather and climate

By garikaib|2022-09-15T12:44:59+02:00January 24th, 2023|O Level Geography, Weather and Climate|

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 […]

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Convergence/Cyclonic/Frontal/Depression rainfall

By garikaib|2022-09-15T12:44:48+02:00January 24th, 2023|O Level Geography, Weather and Climate|

Zimbabwe receives most of its rainfall from the ITCZ. Image by Aljezeera. ZIMSEC O Level Geography Notes: Frontal/ Cyclonic/Convergence Rainfall

This is also know as frontal or cyclonic or depression rainfall.
Cyclonic rainfall occurs in the temperate latitudes and is […]

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Convergence and collision zones/plates

By garikaib|2022-09-15T12:44:35+02:00January 24th, 2023|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

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 […]

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Weathering

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

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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Yardangs, Zeugens and Rock Pedestals

By garikaib|2022-09-15T12:44:14+02:00January 24th, 2023|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

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 […]

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Landforms resulting form river processes

By garikaib|2022-09-15T12:44:03+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

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 […]

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River capture

By garikaib|2022-09-15T12:43:39+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

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, […]

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Factors influencing the siting and location of settlements

By garikaib|2022-09-15T12:41:07+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

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