Four Stroke Petrol Engine. Image credit petrolheadkenya.com ZIMSEC O Level Combined Science Notes: The Petrol engine
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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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
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
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, […]
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
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Construction workers require a lot of energy. Image credit nehandaradio.com ZIMSEC O Level Combined Science Notes: Experiment: People and Energy
Image credit raanetwork.org ZIMSEC O Level Combined Science Notes: Male Reproductive system
Male reproductive system. Image credit goldiesroom.org
Image credit idealscounseling.orgZIMSEC O Level Combined Science Notes: Population Dynamics
Factors affecting population change
Tobacco graders working in a group. Image credit flickr.com ZIMSEC O Level Business Studies Notes: Uses of Herzberg’s Theory