February 2025

Mineral Nutrition Experiment

By |2025-02-12T08:58:42+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Phosphorus Deficiency. Image credit iastate.edu Phosphorus Deficiency. Image credit iastate.edu ZIMSEC O Level Notes Combined Science: Mineral Nutrition Experiment

Aim: Investigating the effects of mineral elements on plant growth.

Materials

Young wheat or pea seedlings, test tubes, mineral solutions/culture solutions, cotton wool, foil or black paper, stands for test tubes.

Method

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Poultry and Rabbit feeds

By |2025-02-12T09:29:54+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Poultry and Rabbit feeds

Chickens

  • Food forms the major part of costs when rearing poultry for eggs and meat.
  • It is therefore vital that the poultry  feed is obtained, mixed and given to chickens in the most economic and cost saving way.
  • The range of feed and the composition of the diet depends on […]
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Determining whether an account has a debit or credit balance

By |2025-02-12T09:07:52+02:00February 12th, 2025|Notes, Ordinary Level Notes, Principles of Accounts Notes|

image credit tahitidance.com image credit tahitidance.com

ZIMSEC O Level Principles of Accounts Notes:Determining whether an account has a debit or credit balance

  • Sometimes in a bid to confuse you during the examination examiners will present you with a jumbled list of balances which might require you to determine whether the accounts […]
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Portuguese Posts (feiras) in and Ports in the Mutapa state

By |2025-02-12T09:42:19+02:00February 12th, 2025|Notes, O Level History Notes, Ordinary Level Notes|

A map showing early Portoguese settlements in Zimbabwe A map showing early Portuguese settlements in Zimbabwe. Image by MediaWiki ZIMSEC O Level History Notes: The Portuguese in Zambezi Valley: Portuguese Posts (feiras) in and Ports in the Mutapa state

Trading Posts/Feiras in the Mutapa State

  • The following were the Trading Posts or […]
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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

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