February 2025

Machines:Levers

By |2025-02-12T09:36:07+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Machines:Levers

  • A lever is a very simple machine
  • It is made up of a rigid bar resting on a pivot,
  • used to move a  load with one end
  • by applying an effort on the other end
  • Examples of machines that use the lever are:
  • scissors, human arm, hand pump, claw hammer, shovel

 

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Diseases: Malaria

By |2025-02-12T09:26:39+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The female anopheles mosquito. Image credit abrushwithafrica.com The female anopheles mosquito. Image credit abrushwithafrica.com ZIMSEC O Level Combined Science Notes: Diseases: Cholera

  • Malaria is deadly disease
  • It is caused by (the pathogen) a group of protozoa (single-celled animal) called Plasmodium
  • The protozoa lives in the female Anopheles mosquito and in humans

NB Mosquitos do […]

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Managing Ecosystems

By |2025-02-12T09:10:48+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The savannah. Image credit wildnatureinstitute.org The savannah. Image credit wildnatureinstitute.org ZIMSEC O Level Combined Science Notes: Managing Ecosystems

  • The ecosystem needs to looked after to ensure it is in balance
  • Humans can have good or bad effects on the ecosystem
  • Soil is an especially important component of the Zimbabwean ecosystem because […]
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Matrix organisation structure

By |2025-02-12T09:08:33+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

An example of a matrix based organisational structure

ZIMSEC O Level Business Studies Notes: Matrix organisational structure

  • Is an organisational structure where subordinates have more than one reporting line i.e. some individuals report to more than one superior.
  • It is also known as the hybrid organisational structure as it incorporates […]
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Communication in Business: Emails

By |2025-02-12T09:39:04+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Gmail Email. Image credit play.google.com

ZIMSEC O Level Business Studies Notes: Leadership:Communication in Business: Emails

  • Refers to electronic messages send from one computer/smart device to another
  • It takes place on the internet
  • Both the user and the sender have an address in the form of user@example.com
  • The sender can send messages to […]
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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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Zwide and Dingiswayo

By |2025-02-12T09:17:53+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

A dance in honour of King Dingiswayo. Image credit dailysun.co.za

ZIMSEC O Level History Notes: Crisis in Nguniland: Zwide versus Dingiswayo

  • Dingiswayo(circa 1780-1817) was born Godongwana
  • He staged a failed coup against his father who was the king of the Mthethwa
  • He fled and adopted the name Dingiswayo which means wanderer
  • He came back […]
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