Making coke ZIMSEC O Level Combined Science Notes: Experiment:Making coke and collecting the resulting gases
Aim: To make coke using coal and collect the gas and liquid by-products
Materials: crushed coal, test tubes, glass tubing, splints, lead ethanoate solution, filter paper, red and blue litmus paper, sodium hydroxide solution, beaker, water, trough, […]
Like charges repel and unlike attract ZIMSEC O Level Combined Science Notes: Experiment: Charges between charged bodies
Aim: To demonstrate the forces of static electricity
Materials: glass/perspective rod, 2 polythene rods, silk cloth, woolen cloth and 2 watch-glasses
Method
Testing simple cell electrodes ZIMSEC O Level Combined Science Notes: Experiment: To measure the potential difference of a simple cell
Aim: To measure the potential difference of a simple cell when different electrodes are used
Materials: dilute sulphuric acid, voltmeter, beaker, leads and crocodile clips, magnesium ribbon,lead foil, copper foil, […]
Demonstrating the motor effect. Image credit ideas-inspire.com ZIMSEC O Level Combined Science Notes: Experiment: Demonstrating that an electric wire moves in a magnetic field
Aim: To demostrate how a current carrying wire moves in a magnetic field
Materials: a length of flexible wire, small pieces of cardboard […]
Brazing. Image credit samarthenggworks.com ZIMSEC O Level Combined Science Notes:Types of joints
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An arch shaped dam wall. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: Dams
Siphons being used for irrigation. Image credit wonderopolis.org ZIMSEC O Level Combined Science Notes: The siphon
Image credit keyword-suggestions.com ZIMSEC O Level Combined Science Notes: Disease:The body’s defence mechanisms
Black couple. Image credit blackcouplegetaways.com ZIMSEC O Level Combined Science Notes:Contraception:Ways to prevent pregnancy
How it works
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A solar pump in a rural marginal area. Image credit massmaninter.com ZIMSEC O Level Combined Science Notes: Marginal areas in Zimbabwe