Fermentation of glucose ZIMSEC O Level Combined Science Notes: Experiment: making ethanol
Aim: To make ethanol by fermenting glucose
Materials: conical flask/plastic bottle, cork, glass/rubber tube,lime water, 5% glucose solution, yeast, mealie meal
Method
Lightning conductors in action. Image credit ask.com ZIMSEC O Level Combined Science Notes: Lightning and safety
Panels are made from linked solar cells. Image credit thinksolar-us.com ZIMSEC O Level Combined Science Notes: Experiment: Connecting solar cells to make panel
Aim: Connecting solar cells to make a solar panel
Materials: 3 or more solar cells, connecting leads, a voltmeter and an […]
Fleming’s right hand rule ZIMSEC O Level Combined Science Notes: Fleming’s Left hand rule
A house is a structure, so is furniture and staircases window/door frames etc. Image credit abduzeedo.com ZIMSEC O Level Combined Science Notes:Structures and construction materials
Lever position and effort ZIMSEC O Level Combined Science Notes: Experiment: Lever position and mechanical advantage
Aim: To show that mechanical advantage depends on lever position
Materials: 1m rectangular poplar wood pieces, string, measuring tape, weights, clamp
Method
Syringes showing how a hydraulic machine works ZIMSEC O Level Combined Science Notes: Experiment: To show how a hydraulic Machine increases force
Aim: To show how a hydraulic machine increases force
Materials: small syringe, syringe with larger diameter, plastic tube, water, ruler
Method
A Zimbabwean family ZIMSEC O Level Combined Science Notes: Reproduction in Humans
Image credit singleblackmale.org ZIMSEC O Level Combined Science Notes: Sexually Transmitted Infections (STIs)
To access more topics go to the Combined Science Notes page
ZIMSEC O Level Combined Science: Carbon Dioxide and Photosynthesis
Aim: To test whether carbon dioxide is necessary for photosynthesis.
Materials: Potted green plants, potassium hydroxide solution (soda lime), two polythene bags/two bell jars, string, apparatus and reagents for the start test.
