Notes Archives - Page 27 of 189 - Free ZIMSEC & Cambridge Revision Notes

Water and ion uptake in plants

By garikaib|2025-02-12T09:39:01+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The effect of loss and gain of water in plants respectively. Image credit slideshare.net ZIMSEC O Level Combined Science Notes:Water and ion uptake in plants

When plant cells are surrounded by water, the water enters by osmosis […]

Comments Off

Public Limited Company

By garikaib|2025-02-12T09:05:49+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

OK is an example of a Publice Limited Company. Image credit newsdzezimbabwe.co.uk ZIMSEC O Level Business Studies Notes: The Features of a Public Limited Company

Is a limited liability company whose shares can be bought and sold publicly on […]

Comments Off

The circulatory system of mammals

By garikaib|2025-02-12T09:18:59+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The main parts of the human circulatory system. Image credit organsofthebody.com ZIMSEC O Level Combined Science Notes: The circulatory system of mammals

Mammals also have a transport system just like plants
With this transport system things like food, oxygen,water and other substances […]

Comments Off

Science: Ecosystems

By garikaib|2025-02-12T09:38:28+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

An ecosystem diagram. Image credit ck12.org ZIMSEC O Level Combined Science Notes: Ecosystems

Is a self-contained system of interdependent organisms and their physical environment
An ecosystem can also be defined as a biological community of interacting organisms and their physical environment.
In an ecosystem a community of living […]

Comments Off

Natural Ecosystems

By garikaib|2025-02-12T09:01:20+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Impala ecosystem Natural ecosystem. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Natural Ecosystems

In a natural ecosystem there is close interaction between the plants and animals
The green plants are the producers
The animals are the consumers
There are several levels of consumers
Primary consumers-these eat plants directly
They are also known as herbivores
Secondary […]

Comments Off

Experiment: to show the cooling effect of vaporizing ether

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

Vapourising ether. ZIMSEC O Level Combined Science Notes: Experiment: to show the cooling effect of vaporizing ether

Materials: ether, glass tube, small wooden block, glass beaker

Method

Place a small beaker over a few drops of […]

Comments Off

The contents of a Balance Sheet/Statement of Financial Position

By garikaib|2025-02-12T09:34:08+02:00February 12th, 2025|Notes, Ordinary Level Notes, Principles of Accounts Notes|

The balance sheet contains several items that have to be explained. Image credit alignmt.com ZIMSEC O Level Principles of Accounts Notes: The contents of a Balance Sheet/Statement of Financial Position

While a Balance Sheet could just be […]

Comments Off

Principles of accounts:Bank Overdrafts

By garikaib|2025-02-12T09:08:30+02:00February 12th, 2025|Notes, Ordinary Level Notes, Principles of Accounts Notes|

Business often make use of Overdrafts. Image credit telegraph.co.uk ZIMSEC O Level Principles of Accounts Notes: The Cash Book:Bank Overdrafts

Bank overdrafts are a way for businesses to borrow money in the short term
With bank overdrafts the business is allowed to withdraw […]

Comments Off

The nature,importance and uses of capital

By garikaib|2025-02-12T09:25:31+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Capital also includes the equipment that a business uses. Image credit MediaWiki

ZIMSEC O Level Business Studies Notes: The nature,importance and uses of capital

The word capital has a lot of meanings
In business […]

Comments Off

Oxidation of iron/Rusting
Gallery
Oxidation of iron/Rusting

Notes, Ordinary Level Notes

Oxidation of iron/Rusting

By garikaib|2025-02-12T09:44:16+02:00February 12th, 2025|Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Oxidation of iron/Rusting

Iron combines with oxygen to form rust
The oxidation process of iron is known as rusting
Rust is a reddish-brown crust that forms on iron
It is iron oxide
\text{iron+oxygen}\rightarrow\text{iron oxide}
Most iron objects such as nails, paper clips, wires and iron coins rust when they are exposed to the […]

Comments Off

February 2025