Ordinary Level Notes Archives - Page 6 of 180 - Free ZIMSEC & Cambridge Revision Notes

Experiment: To compare the resistance of different woods to termite attack

By garikaib|2025-02-12T09:28:10+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Treated poles. Image credit lynnridgetimbers.co.za ZIMSEC O Level Combined Science Notes: Experiment: To compare the resistance of different woods to termite attack

Aim: To compare the resistance of different types of wood to termite attack

Materials: gloss paint, used motor oil, creosote, 4 samples of softwood (pine), 4 samples of […]

Comments Off

The concept of pressure
Gallery
The concept of pressure

Notes, O Level Science Notes, Ordinary Level Notes

The concept of pressure

By garikaib|2025-02-12T08:59:22+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: The concept of pressure

Pressure is the force acting over an area
In such pressure is usually the force per unit area exerted by a fluid/gas
over a surface with which it is in contact
\text{Pressure=} \dfrac{Force}{Area}
If a big force is exerted over a small area it results high pressure
An example […]

Comments Off

Experiment: Finding conditions necessary for growth of microorganisms

By garikaib|2025-02-12T09:19:51+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Mouldy bread and their conditions. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Experiment: Finding conditions necessary for growth of microorganisms

Aim: To determine factors affecting the growth of microorganisms in food

Materials: 3 containers with sterilized lids, brad, milk, burners, drying agent (calcium chloride)

Method

Pour […]

Comments Off

Contraception:Ways to prevent pregnancy

By garikaib|2025-02-12T09:37:24+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

There are several major methods of contraception. Image credit relationshipplaybook.com ZIMSEC O Level Combined Science Notes:Contraception:Ways to prevent pregnancy

Contraception-the deliberate use of artificial methods or other techniques to prevent pregnancy as a consequence of sexual intercourse
Common methods of contraception […]

Comments Off

Blair toilet

By garikaib|2025-02-12T09:04:15+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Blair Toilet. Image credit thestandard.co.zw ZIMSEC O Level Combined Science Notes: Blair toilet

This was developed by the Blair Research Laboratory

The Blair Toilet.

It is a refinement of the pit latrine
They use […]

Comments Off

Hourly rate/Time rate

By garikaib|2025-02-12T09:23:14+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Teachers receive a time rate pay. Image credit tlantablackstar.com

Teachers receive a time rate pay. Image credit atlantablackstar.comZIMSEC O Level Business Studies Notes: Hourly rate/Time rate

This is a way of paying workers based on the time/hours spent working
The number of hours is calculated by multiplying a pre-agreed rate with the […]

Comments Off

Delegation

By garikaib|2025-02-12T09:40:31+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Delegation. Image credit blackenterprise.com

ZIMSEC O Level Business Studies Notes: Delegation

Delegation-is the transfer of authority and responsibility by a superior/manager to a subordinate
to carry out specific function,duties and tasks
The delegator remains accountable for the outcome of the delegated work
Delegation results in decentralisation

[…]

Comments Off

Written Communication

By garikaib|2025-02-12T09:16:10+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Written Communication. Image credit theodysseyonline.com

ZIMSEC O Level Business Studies Notes: Written Communication

Involves any type of message that involves the use of the written word
It includes things like emails, reports, letters, instant messages (Whatsapp and Facebook)

Advantages