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 […]
An electric motor. Image credit jeffryerickson.com ZIMSEC O Level Combined Science Notes: Experiment:Making a model electric motor
Aim: To make a model electric motor
Materials: copper wires, switch, coil (made from varnished copper), magnet, paper clips, rechargeable battery
Method
Welding joints. Image credit youtube.com ZIMSEC O Level Combined Science Notes:Experiment: Testing the strength of various joints
Aim: To test the strength of various joints in beams
Materials: pieces of metal,poplar wood, glue, drawing pins/nails, bolts and nuts, old plastic rulers, burner, bricks/clamp, welding equipment/burner
Method ![Testing [...]
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An arch shaped dam wall. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: Dams
Bicycle pump in action. Image credit mpora.com ZIMSEC O Level Combined Science Notes: Pumps: Cycle pump
The internal structure of a cycle pump […]
Parirenyatwa entrance. Image credit financialgazette.co.zw ZIMSEC O Level Combined Science Notes: Introduction to diseases
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A married couple. Image credit rawstory.com ZIMSEC O Level Combined Science Notes:Contraception:Diaphragm/Dutch cup
How it works 
A diaphragm/cervical cap. Image credit path.org
Milk can be used to test the purity of water. Image credit wordpress.com ZIMSEC O Level Combined Science Notes: Testing the purity of water
Materials: 4 test tubes, sterilised fresh milk, tap water, borehole water, spring water. plugs
Method
Image credit arboday.org ZIMSEC O Level Combined Science Notes: End products of photosynthesis and their fate
ZIMSEC O Level Combined Science Notes: Poultry and Rabbit feeds
Chickens
