natural resources Archives - Page 3 of 10 - Free ZIMSEC & Cambridge Revision Notes

Natural Resources: Water quality

By Rachel Majaya|2022-09-15T12:34:57+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Water Quality is important. Image credit goinggreenrecyclingnigeria.org

ZIMSEC O Level Geography Notes: Natural Resources: Water: Water quality

The quality of water can be improved by:

Improving water treatment techniques.
Improving sanitation at household level.
Treating sewage before discharging it in streams and rivers.
Recycling industrial waste.
Use of bio-degradable chemicals in the […]

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Problems faced by the ocean and sea fishing industry

By Rachel Majaya|2022-09-15T12:34:43+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Fishing using mosquito nets along the coast of Tanzania. Image credit nytimes.com

ZIMSEC O Level Geography Notes: Natural Resources: Fishing: Problems faced by sea fishing industry

The sea fishing industry in Southern Africa faces a number of problems which include the following.

Over-exploitation of marine resources particularly fish.

Fishing has increasingly become […]

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Nuclear power: Introduction

By Rachel Majaya|2022-09-15T12:34:34+02:00January 24th, 2023|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|2022-09-15T12:34:21+02:00January 24th, 2023|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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Conservation of mineral resources

By Rachel Majaya|2022-09-15T12:35:22+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

A pile of metal awaiting recycling. Image credit earth911.com

ZIMSEC O Level Geography Notes: Natural Resources:Conservation of mineral resources

Conservation of resources is the ethical use and protection of valuable resources, such as trees, minerals, wildlife, water and others.
It focuses on maintaining the natural world in order to protect the […]

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Deforestation in tropical rainforests

By Rachel Majaya|2022-09-15T12:35:07+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Deforestation in a Tropical Rainforest. Image credit .worldwildlife.org

ZIMSEC O Level Geography Notes:Natural Resources:Tropical deforestation

Deforestation in tropical rain forests is mainly a result of the need to meet local and external needs.
Local needs are generally basic and include the following:
Agriculture- population pressures and rural poverty forces people to […]

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Natural Resouces: Fishing

By Rachel Majaya|2022-09-15T12:34:55+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Fishing in a river. Image credit africanfishermanonline.com

ZIMSEC O Level Geography Notes: Natural Resources: Fishing: Introduction

Introduction

The Southern Africa Development Community (SADC) countries are found between the Atlantic Ocean on the west and Indian Ocean on the east.
The region is endowed with large fresh water bodies.
These are in the […]

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Sea fishing methods

By Rachel Majaya|2022-09-15T12:34:43+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Hauling in fish during commercial sea fishing. Image credit pinterest.comg

ZIMSEC O Level Geography Notes: Natural Resources: Fishing:Sea fishing methods

The types of fishing methods employed in sea fishing are determined by the type of fish being exploited.
There are two main types of fish found in the oceans of Southern […]

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Nuclear power: Factors affecting location

By Rachel Majaya|2022-09-15T12:34:34+02:00January 24th, 2023|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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Longtitude and time calculations

By Rachel Majaya|2022-09-15T12:35:21+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Different Time Zones

ZIMSEC O Level Geography Notes: Transport and Trade : How to calculate time for different countries

A time zone is a region of the globe that observes a uniform standard time for legal, commercial, and social purposes.
Time zones tend to follow the boundaries of countries and their subdivisions because […]

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January 2023