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

Problems affecting the world’s fishing industry

By Rachel Majaya|2022-09-15T12:34:42+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Over fishing is one of the problems facing the fish industry. Image credit MediaWiki

ZIMSEC O Level Geography Notes: Natural Resources: Fishing:Problems affecting the world’s fishing industry

Slight changes in conditions in the continental shelves alter the food chain.
This reduces fish production.
An example is the decline in anchovy fish […]

Comments Off

Small scale energy sources: Wood stove

By Rachel Majaya|2022-09-15T12:34:33+02:00January 24th, 2023|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

[…]

Comments Off

Resource Exploitation:Mining

By Rachel Majaya|2022-09-15T12:35:34+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Open cast mining. Image credit mutapamining.com

ZIMSEC O Level Geography Notes:Resource Exploitation:Mining: Types of Mining

OPEN CAST AND STRIPPING (SURFACE METHODS)

The open cast method is used when mineral deposits occur in horizontal seams which are near the surface not more than 50 meters deep.
This method involves blasting which is carried […]

Comments Off

Forests in Zimbabwe: Brachystegia Savanna Woodland

By Rachel Majaya|2022-09-15T12:35:19+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

A group of Musasa trees on a low hill. Image credit flickr.com

ZIMSEC O Level Geography Notes: Natural Resources: Renewable Resources: Forests in Zimbabwe: Brachystegia Savanna Woodland

This type of woodland generally covers much of the country’s Highveld, generally lying between 900 and 1 200 metres above sea level.
Brachystegia is […]

Comments Off

Conservation of coniferous forests

By Rachel Majaya|2022-09-15T12:35:05+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

National Park Bashkiriya / Ural Mountains / Russia. Image credit framepool.com

ZIMSEC O Level Geography Notes: Natural Resources: Conservation of coniferous forests

National Parks and protected forest areas have been established both in North America, Europe and the former Soviet Union (now Russia).
Good management approaches are employed to ensure that […]

Comments Off

Fish processing and marketing

By Rachel Majaya|2022-09-15T12:34:50+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Sun dried Kapenta. Image credit blogspot.com

ZIMSEC O Level Geography Notes: Natural Resources: Fishing: Fish processing and marketing

Subsistence and commercial fishers employ more or less the same processing methods.
The high tropical temperatures mean that fish go bad very quickly after being landed from the lakes rivers and swamps.
Small […]

Comments Off

Solutions for sustaining the world’s fisheries

By Rachel Majaya|2022-09-15T12:34:41+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Swimming fish. Image credit National Geographic

ZIMSEC O Level Geography Notes: Natural Resources: Fishing:Solutions for sustaining the world’s fisheries

Increasing fishing disputes have pressured the United Nations into action.
Through the Third United Nations Conference on the law of the Sea of 1974, the UN established a 200 nautical mile zone […]

Comments Off

Energy resources in Zimbabwe

By Rachel Majaya|2022-09-15T12:34:32+02:00January 24th, 2023|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 […]

Comments Off

Resource Exploitation:Mining in Zimbabwe

By Rachel Majaya|2022-09-15T12:35:33+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Chiadzwa Diamond Mine. Image credit mining.com

ZIMSEC O Level Geography Notes: Natural Resources:Resource Exploitation, Mining in Zimbabwe

Zimbabwe has a wide mineral resource base which is exploited commercially.
Large scale mining is dominated by foreign transnational companies such as Anglo-American, Rio Tinto and Ashanti Gold Fields.
The majority of the local […]

Comments Off

Zimbabwean forests: Mopani Savanna woodland

By Rachel Majaya|2022-09-15T12:35:19+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes|

Mopane trees in Matebeland Zimbabwe. Image credit flickr.com

ZIMSEC O Level Geography Notes: Natural Resources: Forestry: Zimbabwean forests: Mopani Savanna woodland

Also known as mopane
This type of woodland is mainly confined to parts of the middle and Lowveld, between 400 and 900 metres above sea level.
Rainfall decreases as one […]

Comments Off

January 2023