Convectional rainfall
Convectional Rainfall commonly occurs in rainforests. Image by Wallpaperlepi ZIMSEC O Level Geography Notes: Convectional Rainfall
February 2025
Plate tectonics
Major Plates of the world. Image by Learner.org ZIMSEC O Level Geography Notes: Plate Tectonics
- The lithosphere (that is the earth’s crust and the rigid part of the mantle) is divided into seven large and several smaller plates.
- A plate is a rock that is found […]
The effects of earthquakes
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 […]
Sand Dunes and Ripples
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 […]
River profile
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 […]
The hydrological / Water cycle
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 […]
Settlements: Introduction
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, […]
Urban sphere of influence and urban hierarchy
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 […]
Population Change
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 […]
Common Killer Diseases in the Tropics: Malaria
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 […]