February 2025

Machines: The inclined plane

By |2025-02-12T09:39:15+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Machines: The inclined plane

  • Is also known as a ramp
  • is a flat supporting surface tilted at an angle,
  • with one end higher than the other,
  • used as an aid for raising or lowering a load
  • Inclined planes are widely used to move heavy loads over vertical obstacles
  • examples vary from a […]
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Hydraulic brakes

By |2025-02-12T09:10:35+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Car brakes. Image driverside.com Car brakes. Image driverside.com ZIMSEC O Level Combined Science Notes: Hydraulic brakes

  • Is another example of hydraulic machines
  • Pressure is applied on the brake pedal using the car driver’s foot

Car brakes. Image credit dtzone.com Car brakes. Image credit dtzone.com […]

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Immunity and Immunisation

By |2025-02-12T09:28:55+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Sindiso Marume holding her brother's health card. Image credit irinnews.org Sindiso Marume holding her brother’s health card. Image credit irinnews.org ZIMSEC O Level Combined Science Notes: Disease:Immunity and Immunisation

  • Immunity-is the ability of the body to resist diseases
  • There are various types of immunity:
  • Antigen-is any substance that causes […]
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Contraception: Abstinence

By |2025-02-12T09:46:09+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Couple holding hands. Image credit neguswhoread.com Couple holding hands. Image credit neguswhoread.com ZIMSEC O Level Combined Science Notes:Contraception: Abstinence

  • It involves total avoidance of sexual intercourse

Adavantages

  • Many couples agree to wait until marriage
  • There is no risk of contracting  Sexually Transmitted Infections
  • It is 100% effective
  • It is supported by most religious […]
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Non Financial Motivation: Job Enrichment

By |2025-02-12T09:35:33+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Job enrichment is a non-financial method to motivate workers. Image credit unieducar.org.br Job enrichment is a non-financial method to motivate workers. Image credit unieducar.org.br ZIMSEC O Level Business Studies Notes: Non Financial Motivation: Job Enrichment

  • is a management concept that involves redesigning jobs so that they are more challenging to the […]
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Informal and Formal groups

By |2025-02-12T09:10:31+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

An informal group of friends. Image credit huffingtonpost.com

ZIMSEC O Level Business Studies Notes: Informal and Formal groups

  • Businesses are formal groups which are created to perform an economic activity and achieve set objectives which may include profit, growth, provision of essential services etc.
  • Informal groups can emerge within these […]
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The city of Bulawayo

By |2025-02-12T09:41:09+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

The City of Bulawayo. Image credit mg.co.za

ZIMSEC O Level Geography Notes: Settlements: The city of Bulawayo

  • Bulawayo is the second largest city in Zimbabwe.
  • With a male population of 303 346
  • Female – 349 991
  • Total population – 653 337 according to the 2012 census.
  • Bulawayo was built at the […]
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Population structure

By |2025-02-12T09:07:55+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

ZIMSEC O Level Geography Notes: Population: Population structure

  • The population structure of a country describes the population’s age, sex and the period males and females are expected to live
  • Population structure is the composition of a given population, which is broken down into categories such as age and gender.
  • This information can be shown on a population […]
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Migration: Introduction

By |2025-02-12T09:19:16+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Forced Migration. Image credit UNHCR

ZIMSEC O Level Geography Notes: Migration: Introduction

  • Migration is the permanent or semi-permanent movement of people from one area to another, one country to another or one continent to another.
  • This involves the change of residence
  • There are several ways to classify migrations and these are:
    1. In terms […]
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