energy Archives - Page 2 of 3 - Free ZIMSEC & Cambridge Revision Notes

Energy:The siting and production of Hydro-electric power: Gorges

By Rachel Majaya|2025-02-12T09:27:59+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Kariba dam wall. Image credit Bloomberg.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:The siting and production of HEP

Site refers to the actual ground on which something is happening.
The siting of a hydro-electric power station depends on a number of physical factors.

Gorge

A gorge is a deep narrow […]

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Advantages and Disadvantages of coal as a source of energy

By Rachel Majaya|2025-02-12T08:58:53+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Burning coal

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

Advantages

Relatively high energy amount.
Fairly plentiful with global estimate use of 4 000 years.
Employment creation in mining, processing, burning and distribution.
Has many other industrial uses.
Relatively cheap energy source.

Disadvantages

Non-renewable […]

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The siting and production of hydro-electric power: Rivers and Space

By Rachel Majaya|2025-02-12T09:28:25+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

The Zambezi River and the Victoria Falls. Image credit thesafarisource.com/

ZIMSEC O Level Geography Notes: Natural Resources: Energy:The siting and production of hydro-electric power

Large perennial rivers

These are also important and necessary for establishing HEP stations.
These ensure a constant supply of a large volume of water required.
When the rivers […]

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Advantages and Disadvantages of Oil/Petroleum as a source of energy
Gallery
Advantages and Disadvantages of Oil/Petroleum as a source of energy

Notes, O Level Geography, Ordinary Level Notes

Advantages and Disadvantages of Oil/Petroleum as a source of energy

By Rachel Majaya|2025-02-12T08:59:26+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

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

Advantages

Has high energy output, an efficient energy source.
Relatively cleaner compared with coal.
Easy to mine if land-based oilfields.
Easy to transport through pipelines.
Can be used to power vehicles
Relatively cheap.
Has a lot of other industrial uses.

Disadvantages

Environmentally […]

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Energy:Thermal power

By Rachel Majaya|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 […]

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Advantages and Disadvantages of Natural gas as a source of energy

By Rachel Majaya|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 […]

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Thermal Power: Locational Factors

By Rachel Majaya|2025-02-12T09:34:28+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Cooling towers. Hwange Thermal. Image credit esi-africa.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Thermal Power: Location Factors

Fuel source

Thermal power stations cab be located at the fuel source.
This is if the fuel is difficult to transport.
For example Hwange Thermal Power station is located at the coal fields.
The […]

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Advantages and Disadvantages of Nuclear power as a source of energy

By Rachel Majaya|2025-02-12T09:00:19+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Nuclear Power Plant. Image credit drug-alcoholtesting.co.uk

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

Advantages

Very long lifespan as half-life of most radioactive substances is about 4 000 years.
Has very high energy output.
Very efficient energy source.
Relatively clean if […]

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Geothermal power: Introduction

By Rachel Majaya|2025-02-12T09:34:50+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Geothermal Power Station. Image credit MediaWiki

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

Geothermal power is generated using steam rhythmically shooting out from underground at high pressure in the form of geysers.
To control the movement of steam, an intricate network of pipes is installed collecting and directing the […]

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