February 2025

Pipelines

By |2025-02-12T09:33:29+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Pipeline under construction. Image credit MediaWiki Pipeline under construction. Image credit MediaWiki ZIMSEC O Level Geography Notes: Transport: Pipeline

Advantages

  • They are very efficient
  • They are cheap once the installation has been completed.
  • They can carry fluids in bulk.

Disadvantages

  • They are immobile i.e the route cannot be changed once they are installed.
  • Can only carry fluids […]
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Did the people of the Mutapa state benefit from the expansion of the state?

By |2025-02-12T09:00:43+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

An early Portuguese map showing the Mutapa state An early Portuguese map showing the Mutapa state. Image credit MediaWiki ZIMSEC O Level History Notes: Mutapa State:Did the people of the Mutapa state benefit from the expansion of the state?

  • The expansion of the Mutapa state brought with it some benefits including:
  • Trade items […]
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Levels of Business Activity

By |2025-02-12T09:16:34+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

ZIMSEC O Level Business Studies Notes: The Three Sectors of the Economy

  • There are three levels of economic activity:
  • Primary Level
  • Secondary Level
  • Tertiary Level

 Primary

coal_hwange
  • All those businesses which are related to extraction of raw material from the earth such […]
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Nutrition

By |2025-02-12T09:11:30+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A balanced diet. Image credit healthandstylish.com A balanced diet. Image credit healthandstylish.com ZIMSEC O Level Combined Science Notes: Nutrition

  • Nutrition is that branch of science that deals with nutrients and nutrition especially in humans
  • It is concerned with  ensuring that humans are eating foods that provide necessary nutrients for health and growth
  • Nutrients […]
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Pollination and Fertilization:The fertilization process

By |2025-02-12T09:28:21+02:00February 12th, 2025|Notes, Ordinary Level Notes|

A fertilised flower. Image credit patricejones.info A fertilised flower. Image credit patricejones.info ZIMSEC O Level Combined Science Notes: Reproduction in plants: The fertilization process

  • After a flower has been pollinated, pollen grains grow down the stigma
  • The pollen grains germinate
  • They grow through the style towards the ovary
  • Inside the ovary are the ovules […]
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Experiment: Testing the infiltration capacity of soils

By |2025-02-12T09:44:29+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Testing infiltration in soils Testing infiltration in soils ZIMSEC O Level Combined Science Notes: Testing the infiltration capacity of soils

Materials: Tins with their tops and bottoms removed, water

Method

  1. Gently push the tins into the ground, make sure that they are in different soil types
  2. Pour 100ml of water into the cylinders and measure […]
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Isotopes and the importance of proton numbers

By |2025-02-12T09:06:50+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The three isotopes of hydrogen. Image credit wikipedia.org The three isotopes of hydrogen. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: Isotopes and the importance of proton numbers

  • The electron orbits of these two elements is small and can only carry two electrons
  • The next element in the series is lithium
  • It comes […]
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The format of a Simple Trading and Profit and Loss Account

By |2025-02-12T09:18:46+02:00February 12th, 2025|Notes, Ordinary Level Notes, Principles of Accounts Notes|

image credit onlinecollegecourses.com image credit onlinecollegecourses.com ZIMSEC O Level Principles of Accounts Notes: The format of a Simple Trading and Profit and Loss Account

The Name of the Business/Proprieter

NB The exact names and types of expenses and other income will vary from business to business you should […]

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An introduction to Beams and their types

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

beams_introduction-min Common types of beams and their associated forces ZIMSEC O Level Combined Science Notes: An introduction to Beams and their types

  • A beam is any material that is supported so that it can hold a load
  • A simple beam is a length of material e.g steel supported along its length so that […]
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