energy Archives - Free ZIMSEC & Cambridge Revision Notes

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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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: 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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Small scale energy sources and plants:Solar energy

By Rachel Majaya|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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Small scale energy sources and plants:Bio-fuel

By Rachel Majaya|2025-02-12T09:45:20+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Jatropha plant. Image credit jatropha.org.za

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Small scale energy sources and plants:Bio-fuel

is a fuel that is produced through contemporary biological processes,
such as agriculture and anaerobic digestion,
rather than a fuel produced by geological processes such as those involved in the formation of fossil […]

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Small scale energy sources: Wood stove

By Rachel Majaya|2025-02-12T09:45:48+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Wood stove. Image credit quadrafire.com

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

A wood stove is a heating appliance capable of burning wood fuel and wood-derived biomass fuel, such as wood pellets.
Wood stove are usually made using a combination of metal(iron) and bricks

[…]

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River Deposition

By garikaib|2025-02-12T09:22:04+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River deposition (left bank). Image credit Panoramio. ZIMSEC O Level Geography Notes: River deposition

Deposition occurs when a river no longer as sufficient energy to transport its load.
When its velocity begins to fall and has less energy, a river’s competence (maximum size of material […]

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Energy resources in Zimbabwe

By Rachel Majaya|2025-02-12T08:56:47+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Wood is a popular fuel source in Zimbabwe. Image credit Flickr.com

ZIMSEC O Level Geography Notes: Natural Resources: Energy:Energy resources in Zimbabwe

The major sources of Zimbabwe’s electrical energy are coal from Hwange and water at Kariba HEP station.
Wood makes small but significant contributions.
All the oil products used in […]

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Energy: Introduction

By Rachel Majaya|2025-02-12T09:26:42+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Power-line to transmit electrical energy

ZIMSEC O Level Geography Notes: Natural Resources:Energy

Energy is power.
It may exist in the form of potential or kinetic energy or in the form of fossil fuels and hydrocarbons.
It is also found in the form of light or heat energy.
Its sources cover all […]

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February 2025