February 2025

Pressure in liquids and the manometer

By |2025-02-12T09:01:22+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Pressure in liquids and the manometer

  • Gravity pulls a liquid down into its container
  • The liquid in turn exerts a pressure on the container
  • The pressure of a liquid at a certain depth is equal in all directions
  • The pressure of a liquid in a container increases with depth
  • This means in a container […]
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Rhythm/Natural Family Planning

By |2025-02-12T09:38:33+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Image credit atlantablackstar.com Image credit atlantablackstar.com ZIMSEC O Level Combined Science Notes:Contraception:Rhythm/Natural Family Planning

How it works

  • Various techniques are used:
  • Learn to recognise the fertile periods in the menstrual cycle and avoid sex during that period
  • Several techniques are used to identify this fertile period:
    1. The temperature method is when […]
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Water closet/Flush toilet

By |2025-02-12T09:05:09+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Water Closet. Image credit rakbathware.com Water Closet. Image credit rakbathware.com ZIMSEC O Level Combined Science Notes: Water closet/Flush toilet

  • Is part of the water borne sewage
  • This means that wastes from the toilet are carried by water to a place where it is processed
  • This is very common in urban homes […]
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Piece Rate

By |2025-02-12T09:24:06+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

ZIMSEC O Level Business Studies Notes: Piece Rate

  • This when a payment is made to a worker for each unit that the worker has produced
  • Workers wages depend on the quantity they have produced
  • It does not consider the time spent by workers in producing each unit
  • Piece rate system is the method of remunerating the workers according to […]
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Tall and Flat organisational structures

By |2025-02-12T09:42:08+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Tall vs Flat Organisational structures. Image credit Huffingtonpost.com Tall vs Flat Organisational structures. Image credit Huffingtonpost.com

ZIMSEC O Level Business Studies Notes: Tall and Flat organisational structures

  • Organisational structures can also, among other terms and ways, be described as either tall or flat
  • This is done by looking at the layers […]
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Visual Communication

By |2025-02-12T09:16:46+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Visual Communication Image credit dmcmedicalgroup.com

ZIMSEC O Level Business Studies Notes: Visual Communication

  • is the expression of information and ideas using visual aids or aids
  • it includes body language and gestures
  • it may also include the use of  photographs, charts, graphs, and diagrams to enforce or demonstrate ideas or data.
  • The use […]
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Rise of Agriculture and Domestication and Rearing of animals

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

Slash and burn agriculture was practiced during the Early Stone Age. Image credit MediaWiki

ZIMSEC O Level History Notes: Early Societies (Late Stone Age – Early Iron Age): Rise of Agriculture and Domestication and Rearing of animals

  • Rise of Agriculture and Domestication and Rearing of animals

Agriculture

  • The use of iron tools led […]
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Importance and effects of foreign trade in the Mutapa state

By |2025-02-12T09:14:20+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

Ivory Trade was part of the Foreign Trade in Mutapa State. Image credit watchdog.co.ug

ZIMSEC O Level History Notes: The Mutapa State (Kingdom): Importance and effects of foreign trade in the Mutapa state

  • Trade played an important role in the Mutapa State

Importance of Trade in the Mutapa Kingdom

  • The cloths and beads […]
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Population and resources

By |2025-02-12T09:25:54+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

There is a link between population and resources. Image credit Flickr.com

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

  • There exists a complex relationship between population, resources and the environment.
  • Population issues are central in any country’s programs that seek to eradicate poverty and diseases as well as sustain economic growth, […]
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