Notes Archives - Page 13 of 189 - Free ZIMSEC & Cambridge Revision Notes

Settlements: Introduction

By garikaib|2025-02-12T09:35:29+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Harare is the most famous settlement in Zimbabwe. Image credit Bulawayo24.com ZIMSEC O Level Geography Notes: Population and Settlement: Introduction

Settlement

Refers to a structure where human beings reside.
It may be made up of one or several dwellings.
The term settlement is, […]

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Hoyt’s Sector model (1939)

By garikaib|2025-02-12T09:01:18+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Hoyt's sector model. Image credit MediaWiki Hoyt’s sector model. Image credit MediaWiki ZIMSEC O Level Geography Notes: Settlements: Hoyt’s Sector model (1939)

It was published as an alternative to Burgess and Park’s concentric model
It was based on a study of 142 American cities.

Assumptions

In making the model Hoyt made some assumptions
The […]

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Types of Goods

By garikaib|2025-02-12T09:17:49+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Street lights are an example of a public good. Image credit source.co.zw ZIMSEC O Level Business Studies Notes: Types of Goods

Goods are tangible products that are sold by businesses to customers and other businesses.
Goods can be classified in […]

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Introduction and importance of population studies

By garikaib|2025-02-12T08:56:31+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

A child holding a clinic card. Image credit BBC ZIMSEC O Level Geography Notes: Population:Introduction and importance of population studies

Population studies is the scientific study of human populations
It entails the study of:

population numbers
Their growth and decline
deaths
births

[…]

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Food types and their importance

By garikaib|2025-02-12T09:11:37+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Different types of food have different functions. Image credit healthydietadvisior.com ZIMSEC O Level Combined Science Notes: Food types and their importance

Carbohydrates-these are energy-rich foods that are largely made up of starch and sugars. They are easily broken down in the […]

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Reproduction in Plants:Development after fertilization

By garikaib|2025-02-12T09:29:14+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A flower fertilisation. Image credit studyblue.com Fertilisation of a flower. Image credit studyblue.com ZIMSEC O Level Combined Science Notes: Reproduction in plants: Reproduction in Plants:Development after fertilization

Once the ovules inside the ovary have been fertilized a lot of changes takes place
The fertilized ovules develop into seeds inside the ovary
The ovary […]

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Experiment: Testing the alkalinity/acidity of the soil

By garikaib|2025-02-12T09:45:43+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Testing the PH of soil. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Testing the alkalinity/acidity of the soil

Materials: Universal indicator/PH paper/PH Test meter, distilled water, test tubes, soil samples

Method

Place the soil samples into test tubes to a height of about […]

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Molecules

By garikaib|2025-02-12T09:07:27+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Molecules of carbon, oxygen, hydrogen and water ZIMSEC O Level Combined Science Notes: Molecules

A molecule is the smallest particle of a compound formed when atoms of elements combines
The atoms combine together by forming bonds
When these bonds are formed there are energy changes
Typically heat energy […]

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Population distribution

By garikaib|2025-02-12T09:22:10+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

World population distribution. Image credit MediaWiki ZIMSEC O Level Geography Notes: Population:Population distribution

Population distribution is the spread of people over an area, country or region
In the past population distribution was mainly influenced by natural factors such as soil fertility and the environment
Whilst natural factors […]

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