February 2025

Population and health

By |2025-02-12T09:28:22+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Unsafe water is a health hazard. Image credit reuters.com

ZIMSEC O Level Geography Notes:Population and resources:Population and health

  • Important sources of a country’s health and quality of life are water supply and sanitation.
  • 97% of the world’s water resources is salty water mainly in the seas and oceans.
  • Of the remaining 3%, […]
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Terms used in Population studies

By |2025-02-12T09:29:08+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes:Population Studies:Terms used in Population studies

  • Birth Rate (or crude birth rate) is the number of live births per 1,000 of the population in a given year. (Not to be confused with the growth rate).
  • Brain Drain is the emigration of a significant proportion of a country’s highly […]
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Causes of Rapid Population change and the effects of rapid population change

By |2025-02-12T09:06:15+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Hopely Farm settlement

ZIMSEC O Level Geography Notes: Population: Causes of Rapid Population change and the effects of rapid population change

  • Improvement in the basic health care which has a lowered the death rate
  • Cultural factors for example, the desire to have a male child factor in the patriarchal societies
  • Need for […]
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Common Killer Diseases in the Tropics

By |2025-02-12T09:29:15+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A map showing the tropics. Image credit MediaWiki

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

  • Zimbabwe lies in the Tropics
  • This is a geographic region found between 0° and 23º North and South of the equator
  • Zimbabwe is of course found on the South side of the equator

    • […]

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Population Change

By |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 […]
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Common Killer diseases in the Tropics: Bilharzia

By |2025-02-12T09:30:10+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Bilharzia is a waterborne disease. Image credit lshtm.ac.uk

ZIMSEC O Level Geography Notes:Common Killer diseases in the Tropics: Bilharzia

  • Is also known as schistosomiasis.
  • It is another serious infection and wide spread in Africa and other tropical and sub-tropical regions.
  • The disease is caused by a flat worm that lives in various […]
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Population structure

By |2025-02-12T09:07:55+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes: Population: Population structure

  • The population structure of a country describes the population’s age, sex and the period males and females are expected to live
  • Population structure is the composition of a given population, which is broken down into categories such as age and gender.
  • This information can be shown on a population […]
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Common Killer Diseases in the Tropics: Malaria

By |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 […]
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Introduction to population growth, change and structure

By |2025-02-12T09:09:45+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes: Introduction to population growth, change and structure

  • There is a strong inter-relationship between birth rate, death rate, population growth, change and structure.
  • Birth rate is the number of live births per 1 000 of the population in one year.
  • \text{Crude Birth Rate}=\dfrac{Number\quad of \quad Live \quad Births \quad in \quad Year}{Total\quad Population \quad in […]
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