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

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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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 Solar energy

By Rachel Majaya|2025-02-12T09:00:48+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Solar Power Plant. Image credit sma-america.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Advantages and Disadvantages of Solar energy

Advantages

Renewable energy source.
Plentiful and inexhaustible.
Very clean.
Relatively cheap.
Can power vehicles.
Suitable even in remote areas.
High energy output.
No pollutions associated with it.

Disadvantages

Expensive for poor rural communities.
Affected […]

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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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Advantages and Disadvantages of Hydroelectricity

By Rachel Majaya|2025-02-12T09:01:03+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A micro-hydroelectric power station. Image credit abc.net.au

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of Hydroelectricity

Advantages

Renewable energy source.
Cheap to maintain as water-transports itself to plants.
Very clean energy source.
Easy to use.
Very versatile, that is many uses.
Large lakes are multi-purpose can also be […]

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Geothermal power: Locational factors

By Rachel Majaya|2025-02-12T09:35:41+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A geothermal station in Iceland. Image credit ucsusa.org

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

Geothermal power can only be generated in areas of active volcanicity.
These areas are known as geothermal hotspots.
These are zones where volcanic activity underground makes rocks hot and these rocks […]

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Advantages and Disadvantages of wood as a source of energy

By Rachel Majaya|2025-02-12T09:01:34+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Burning wood. Image credit villagenews.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Advantages and Disadvantages of wood/crop residue/cow dung as a source of energy

Advantages

Renewable energy sources.
Cheap or free in rural areas.
Easily accessible where forests or woodlands/crops/animals exist.
Tsotso stoves conserve live trees.
Technology very cheap and readily […]

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Nuclear power: Introduction

By Rachel Majaya|2025-02-12T09:36:17+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Koeberg Nuclear Power Station South Africa. Image credit melkbos.com

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

Nuclear power production is similar to thermal power production in a number of ways.
Both require a fuel to heat water and convert it to steam.
However, in the case of nuclear power, […]

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Nuclear power: Factors affecting location

By Rachel Majaya|2025-02-12T09:36:40+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Pelindaba Nuclear station South Africa. Image credit thinkgeoenergy.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy: Nuclear power: Location factors

The pollution caused by nuclear power plants and the ever present danger of a melt down and nuclear fall-out have made such plants very sensitive in terms of location relative to […]

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Small scale energy sources and plants:Biogas plant

By Rachel Majaya|2025-02-12T09:44:21+02:00February 12th, 2025|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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February 2025