O Level Science Notes Archives - Page 33 of 33 - Free ZIMSEC & Cambridge Revision Notes

The Petrol engine

By garikaib|2022-09-15T12:38:54+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Four Stroke Petrol Engine. Image credit petrolheadkenya.com ZIMSEC O Level Combined Science Notes: The Petrol engine

Four strokes are involved in the operation of most petrol engines
They are thus known as four-stroke engines
The first stroke is known as the inlet stroke
During the […]

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Experiment: Determining the resistance of resistors in parallel and in series

By garikaib|2022-09-15T12:38:44+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Resistors in series ZIMSEC O Level Combined Science Notes: Experiment: Determining the resistance of resistors in parallel and in series

Aim: To determine the combined resistance of resistors in series and in parallel

Materials: 4 cells, 2 bulbs/2 resistors, switch, ammeter, voltmeter, leads with crocodile clips

Method Resistors in [...]
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Experiment: Generating electricity

By garikaib|2022-09-15T12:38:37+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

A dynamo. Image credit wikihow.com ZIMSEC O Level Combined Science Notes: Experiment: Generating electricity

Aim: To generate electric current

Materials: dynamo, lamp bulb, copper wires, crank or a set of pulleys and weights to turn dynamo, rubber band

Method

Set up the apparatus with the dynamo on a table, the rubber […]

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Testing the strength of various beams

By garikaib|2022-09-15T12:38:28+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Testing the strength of beams ZIMSEC O Level Combined Science Notes: Experiment: Testing the strength of various beams

Aim: To make different shaped beams and test their strength

Materials: thin pieces of poplar wood, sharp knife, weights, 2 clamps, 2 bricks

Cut beams about 20cm long with different cross-sectional […]

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Experiment: Comparing the strength of natural timber and other construction materials

By garikaib|2022-09-15T12:38:20+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Comparing the strength of various materials ZIMSEC O Level Combined Science Notes: Experiment: Comparing the strength of natural timber and other construction materials

Aim: To compare the strength of some natural timbers and other materials

Materials: Plywood, hard wood cut across the grain, soft wood cut along the grain, […]

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Experiment:Lifting weights using pulleys

By garikaib|2022-09-15T12:38:13+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Testing pulleys using a test meter ZIMSEC O Level Combined Science Notes: Experiment:Lifting weights using pulleys

Aim: To use pulleys to lift loads

Materials: 4 single pulleys, string, 1kg mass/a tin filled with sand, spring balance, clamp stand, meter rule

Method

Set up a fixed pulley as shown above

[…]

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People and Energy

By garikaib|2022-09-15T12:38:06+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Construction workers require a lot of energy. Image credit nehandaradio.com ZIMSEC O Level Combined Science Notes: Experiment: People and Energy

While it is true that everyone needs energy for metabolism and daily activities
Different people have different food needs
Food requirements can […]

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Male Reproductive system

By garikaib|2022-09-15T12:37:55+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Image credit raanetwork.org ZIMSEC O Level Combined Science Notes: Male Reproductive system

The diagram below shows the reproductive system of a man

Male reproductive system. Image credit goldiesroom.org

Testes-this is where sperms are made.

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Population Dynamics

By garikaib|2022-09-15T12:37:48+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Image credit idealscounseling.org

Image credit idealscounseling.orgZIMSEC O Level Combined Science Notes: Population Dynamics

January 2023