O Level Geography Archives - Page 20 of 35 - Free ZIMSEC & Cambridge Revision Notes

Conservation of mineral resources

By Rachel Majaya|2025-02-12T09:01:45+02:00February 12th, 2025|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 […]

Comments Off

Deforestation in tropical rainforests

By Rachel Majaya|2025-02-12T09:41:25+02:00February 12th, 2025|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 […]

Comments Off

Natural Resouces: Fishing

By Rachel Majaya|2025-02-12T09:31:39+02:00February 12th, 2025|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 […]

Comments Off

Problems faced by the ocean and sea fishing industry

By Rachel Majaya|2025-02-12T09:12:49+02:00February 12th, 2025|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 […]

Comments Off

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, […]

Comments Off

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 […]

Comments Off

Humidity

By garikaib|2025-02-12T09:08:25+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Wet and dry bulb thermometer. Image by TradeIndia ZIMSEC O Level Geography Notes: Humidity

-a quantity representing the amount of water vapor in the atmosphere.

It is measured using a hydrometer.
The wet and dry bulb thermometer is also known as a psychrometer.
Weather satellites can […]

Comments Off

People and Weather

By garikaib|2025-02-12T09:30:16+02:00February 12th, 2025|Notes, O Level Geography, Weather and Climate|

People and Weather. Image via CNN. ZIMSEC O Level Geography Notes: People and Weather

The earth’s climate and weather conditions have been changing constantly throughout the earth’s Geological Timescale.
This has in turn had an impact on people’s cultures, history and current economical and social […]

Comments Off

Faulting

By garikaib|2025-02-12T09:28:52+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography|

Common types of faults. Image via Noaa.gov ZIMSEC O Level Geography Notes: Faulting.

Lateral earth movements often produce very great stresses due to compressional forces (when plates move towards one another) and tensional forces (pulling apart).
These forces can cause fractures or breaks in the earth’s crust.
When breaks […]

Comments Off

Landforms resulting from weathering

By garikaib|2025-02-12T09:18:17+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

Ruware/Dwala. Image credit WordPress.com ZIMSEC O Level Geography Notes: Landforms resulting from weathering.

Weathering processes and usually in conjunction with other denudation processes such as water and wind erosion and mass wasting results in the formation of various landscapes.
In temperate and tropical latitudes these include:

1.Inselbergs/Monadnocks

The […]

Comments Off

February 2025