O Level Geography Archives - Page 27 of 35 - Free ZIMSEC & Cambridge Revision Notes

The effects of earthquakes

By garikaib|2025-02-12T09:08:11+02:00February 12th, 2025|Landform Studies, Notes, O Level Geography, Ordinary Level Notes|

A tsunami in Miyako Japan 2011/Image credit Ibtimes. ZIMSEC O Level Geography Notes: The effects of Earthquakes.

Factors that may affect the impact of earthquakes.

Distance of concerned area from epicenter although you should take note of the factor below.
Coastal locations have a higher risk […]

Comments Off

Sand Dunes and Ripples

By garikaib|2025-02-12T09:42:27+02:00February 12th, 2025|Hot Deserts, Notes, O Level Geography, Ordinary Level Notes|

Seif dunes. Image credit 7-themes.com ZIMSEC O Level Geography Notes: Sand Dunes

As soon as wind velocity drops wind deposition occurs.
The heaviest material is deposited first while the finer material and dust is carried further before being dropped.
As a result loess (which consists of fine particles) is sometimes […]

Comments Off

River profile

By garikaib|2025-02-12T09:30:07+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The long profile of a river. Image credit worldbuildingschool.com ZIMSEC O Level Geography Notes: River Profile

Rivers can be studied from two aspects viz:
The long profile-this is the cross section along the river’s entire length from its source to its mouth.
The short profile-this […]

Comments Off

The hydrological / Water cycle

By garikaib|2025-02-12T09:00:59+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The hydrological cycle. Image credit BBC ZIMSEC O Level Geography Notes: The hydrological cycle.

Water does not leave or enter the planet earth.
It is instead continuously transferred between the atmosphere and the oceans.
The system of inputs, storages,flows and outputs is known as the water or hydrological […]

Comments Off

Settlements: Introduction

By garikaib|2025-02-12T09:35:29+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Harare is the most famous settlement in Zimbabwe. Image credit Bulawayo24.com ZIMSEC O Level Geography Notes: Population and Settlement: Introduction

Settlement

Refers to a structure where human beings reside.
It may be made up of one or several dwellings.
The term settlement is, […]

Comments Off

Urban sphere of influence and urban hierarchy

By garikaib|2025-02-12T09:46:05+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Harare has a sphere of influence that covers the whole country. Image credit harare-info.com ZIMSEC O Level Geography Notes: Settlements:Urban sphere of influence and urban hierarchy

A sphere of influence is an area which depends on a […]

Comments Off

Population Change

By Rachel Majaya|2025-02-12T09:06:53+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Health care improvements affect population change. Image credit ibtimes.co.uk

ZIMSEC O Level Geography Notes: Population: Population Change

The difference between the size of the population to the end and the beginning of a period.
This change is developmental, that is, it has stages through which a population passes
This theory can be […]

Comments Off

Common Killer Diseases in the Tropics: Malaria

By Rachel Majaya|2025-02-12T09:30:27+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Anopheles Mosquito. Image credit voanews.com

ZIMSEC O Level Geography Notes:Common Killer Diseases in the Tropics: Malaria

Malaria is one of the most widespread diseases in Tropical Africa.
It is caused by a parasite called plasmodium,
which is transmitted by the female anopheles mosquito.
When a female anopheles mosquito bites a patient, it […]

Comments Off

Farming as a system

By Rachel Majaya|2025-02-12T09:22:14+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A farm/family plot can be viewed as a system. Image credit mg.co.za

ZIMSEC O Level Geography Notes:Agriculture:Farming as a system

A farm is a tract of land on which crops and often livestock are raised for livelihood
A farm can be viewed as a system
A system is a set of interacting […]

Comments Off