February 2025

Substance Abuse: Smoking

By |2025-02-12T09:22:39+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A man smoking and selling Tobacco at an Auction floor. Image credit voanews.com A man smoking and selling Tobacco at an Auction floor. Image credit voanews.com ZIMSEC O Level Combined Science Notes: Substance Abuse: Smoking

  • In most countries including smoking is legal
  • It is also socially accepted
  • Cigarette smoke(tobacco smoke) contains […]
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Contraception: The pill

By |2025-02-12T09:39:17+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Image credit citifmonline.com Image credit citifmonline.com ZIMSEC O Level Combined Science Notes:Contraception: The pill

  • Are also known as birth control pills (BCPs) or
  • Oral Contraceptive Pills (OCPs)

How it works

  • They contain the two female hormones: oestrogen and progesterone
  • They prevent the release of ova/female sex cells
  • They cause growth of an […]
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Centralised Sewage Treatment Works

By |2025-02-12T09:06:37+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Sewage treatment works at Morton Jaffray,Harare. Image credit hararenews.co.zw Sewage treatment works at Morton Jaffray,Harare. Image credit hararenews.co.zw ZIMSEC O Level Combined Science Notes: Centralised Sewage Treatment Works

  • Are used to collect and treat sewage waste from large industrial and residential areas
  • They treat large quantities of human waste
  • The raw […]
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Performance Related Pay

By |2025-02-12T09:24:46+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Performance related pay can improve performance. Image credit loophaiti.com Performance related pay can improve performance. Image credit loophaiti.com ZIMSEC O Level Business Studies Notes: Performance Related Pay

  • A financial reward system for employees where some or all
  • of their monetary compensation is related to how their performance
  • This performance is based […]
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Job description

By |2025-02-12T09:44:33+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Job description. Image credit atlantablackstar.com Job description. Image credit atlantablackstar.com

ZIMSEC O Level Business Studies Notes: Job description

  • it is a formal account of an employee’s responsibilities
  • is a formal summary of the duties of a position
  • it states the essential responsibilities of the job
  • It often comes in the form of a […]
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Upward, Downward, Horizontal Communication

By |2025-02-12T09:25:52+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Horizontal communication is between peers. Image credit life.wevorce.com

ZIMSEC O Level Business Studies Notes: Leadership: Upward, Downward, Horizontal Communication

  • When it comes to direction communication can be classified as horizontal, downward or upward
  • Downward communication follows the chain of command from the topmost levels to the subordinates
  • This can be used […]
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Effects of the usage of iron

By |2025-02-12T09:00:44+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

An Iron Age compound (reconstruction). Image credit archaeology.org

ZIMSEC O Level History Notes: Early Societies (Late Stone Age – Early Iron Age): Effects of the usage of iron

  • the effects of the usage of iron during the Iron Age can be divided into various groups:

Economic effects

  • The introduction made it possible for […]
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Military of the Mutapa Organisation of the Mutapa State

By |2025-02-12T09:14:52+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

African Spear. Image credit swordsantiqueweapons.com

ZIMSEC O Level History Notes: The Mutapa State (Kingdom): Military of the Mutapa Organisation of the Mutapa State

  • The Mutapa did not have a standing army
  • The army was mobilized from peasants when there was an emergency
  • The war council in the Mutapa state was known as […]
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Population and Land

By |2025-02-12T09:27:06+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Ploughing sandy soils. Image credit zimbabweelection.com

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

  • Land is the most important natural resource base in a country.
  • This is especially true for a country like Zimbabwe whose economy is agro-based
  • Rapid population growth increases human demand on the land causing heavy damage to […]
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People who occupied Western Zimbabwe when the Ndebele arrived

By |2025-02-12T09:41:58+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

Shona women. Image credit emaze.com

ZIMSEC O Level History Notes: The Ndebele State: People who occupied Western Zimbabwe when the Ndebele arrived

  • These are the tribes who occupied Zimbabwe when the Ndebele arrived:
    1. Virwa
    2. Kalanga
    3. Nyubi
    4. Tonga
    5. Venda

To access more topics go to the History Notes page.

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