Ordinary Level Notes Archives - Page 17 of 180 - Free ZIMSEC & Cambridge Revision Notes

The direct current generator

By garikaib|2025-02-12T08:57:49+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A DC Generator showing the basic components. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: The direct current generator

In a DC generator current only flows in one direction
A DC generator has a commutator instead of slip rings
A […]

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To investigate whether the length of a beam affects its strength

By garikaib|2025-02-12T09:11:03+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Testing the length and strength of beams ZIMSEC O Level Combined Science Notes: Experiment:To investigate whether the depth of a beam affects its strength

Aim: To show how the length of a beam affects its strength

Materials: drinking straws, clamps, weights

Method

Clamp the ends of a straw […]

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Experiment To show the effect of sulphuric acid on some materials

By garikaib|2025-02-12T09:27:31+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The effects of acid rain. Image credit penguinsofchemistry.wordpress.com ZIMSEC O Level Combined Science Notes: Experiment To show the effect of sulphuric acid on some materials

Aim: To show the effect of sulphuric acid on some materials

Materials: dilute sulphuric acid, wood, copper, plastic, iron, steel, aluminium, […]

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Dealing with friction in machines

By garikaib|2025-02-12T08:57:51+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Pouring oil into an engine. Image credit tenerifenews.com ZIMSEC O Level Combined Science Notes: Dealing with friction in machines

Friction is the force that opposes all movement
It is the resistance that one surface or object encounters when moving over another
Work must […]

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Food Preservation

By garikaib|2025-02-12T09:18:49+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

Perishable foods ZIMSEC O Level Combined Science Notes: Food Preservation

A lot of the fresh food that humans eat is perishable
This is because this food is also food for bacteria, fungi and other micro-organisms
If fresh perishable food is left out in the open it will soon deteriorate […]

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Pregnancy
Gallery
Pregnancy

Notes, O Level Science Notes, Ordinary Level Notes

Pregnancy

By garikaib|2025-02-12T09:35:40+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Pregnancy

The vagina receives an erect penis during sexual intercourse
During sexual intercourse, sperms are ejaculated into the vagina
There they begin to swim up to the oviducts
If an ovum is released at this time it may be fertilised in the oviduct
Although many sperms reach the ovum only one will […]

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Pit latrine

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

Pit Latrine. Image credit sswm.info ZIMSEC O Level Combined Science Notes: Pit Latrine

It consists of a deep hole in the ground into which all human urine and faeces (excrement) are deposited

A pit latrine

[…]

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Motivation and Motivational Theories

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

Construction workers. Image credit biznetafrica.com ZIMSEC O Level Business Studies Notes: Motivation and Motivational Theories

People work for any number of reasons
Most people work because they want to earn money and survive while others work voluntarily
Others work because they find meaning and fulfillment in […]

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Centralisation and decentralization

By garikaib|2025-02-12T09:38:34+02:00February 12th, 2025|Notes, O Level Business Studies Notes, Ordinary Level Notes|

Decentralisation vs Centralisation. Image pixabay.com

ZIMSEC O Level Business Studies Notes: Centralisation and decentralization

An organisation’s structure can be centralised or decentralised
Centralisation-is when power, authority and decision making are concentrated at the top of the organisation’s hierarchy
This means activities such as planning and decision making are […]

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