Ordinary Level Notes Archives - Page 27 of 180 - Free ZIMSEC & Cambridge Revision Notes

Variation

By garikaib|2025-02-12T08:59:05+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Variation in chillies. Image credit chilipapryczka.pl ZIMSEC O Level Combined Science Notes: Variation

The living world has many thousands of different types of plants and animals
For example lions are different from hyenas which in turn are different from say goats
In plants the Msasa trees are […]

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Experiment: to show that solids change shape when they melt

By garikaib|2025-02-12T09:11:07+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Melting wax takes up the shape of the container. Image credit about.com ZIMSEC O Level Combined Science Notes: An experiment to show that solids change shape when they melt

Materials: tin lid/evapouration dish, burner, burner stand, candle wax

Method

place […]

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Population Distribution in Africa

By garikaib|2025-02-12T09:29:57+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

The burstling streets of Harare. Image credit herald.co.zw ZIMSEC O Level Geography Notes: Population:Population Distribution in Africa

The total area of Africa is 30.2 million square kilometers
As of 2013 it had a population of about 1.11 billion people accounting for 15% of the world’s […]

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Entries into the Cash Book

By garikaib|2025-02-12T09:02:22+02:00February 12th, 2025|Notes, Ordinary Level Notes, Principles of Accounts Notes|

Cash book entries. Image credit mexperience.com ZIMSEC O Level Principles of Accounts Notes: The Cash Book:Entries into the Cash Book

We will now look at the following example:

Write up a two-column cash book for a S Munodei’s Furniture Shop from the following details, and
balance it off […]

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Properties of Nonmetals vs metals

By garikaib|2025-02-12T09:21:43+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Common metal objects. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Experiment: Properties of Metals and Non-Metals

Elements can be divided into two groups:
Metals and Non-metals
Examples of metals are: copper, zinc, iron, gold, silver, chrome, lead and tin
Almost all metals have certain properties that makes them […]

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Experiment: The reaction of metals with dilute Hydrochloric acid

By garikaib|2025-02-12T09:41:04+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Copper does not react with hydrochloric acid. Image credit fphoto.com ZIMSEC O Level Combined Science Notes: Experiment: The reaction of metals with dilute Hydrochloric acid

Aim: To examine the reactivity of metals with dilute hydrochloric acid

Materials: 5 test tubes, dilute hydrochloric acid, magnesium, zinc, […]

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Neutralisation/Salts
Gallery
Neutralisation/Salts

Notes, O Level Science Notes, Ordinary Level Notes

Neutralisation/Salts

By garikaib|2025-02-12T09:10:01+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Neutralisation/Salts

The acidity and alkalinity of a solution can be represented on the pH scale
If the pH is low i.e less than 7 then the solution is acidic
If the pH is high i.e higher than 7 then the solution is alkaline
If a solution has a pH of 7 […]

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Extraction of copper from sulphides
Gallery
Extraction of copper from sulphides

Notes, O Level Science Notes, Ordinary Level Notes

Extraction of copper from sulphides

By garikaib|2025-02-12T09:26:36+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes:Extraction of copper from sulphides

Copper is extracted from various types of ore including sulphide ores
For example copper ores found on the Great Dyke near Mhangura is of the sulphide type
Once the sulphide ore is extracted from the earth
It is crushed to form a very fine powder which is then further […]

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