Experiment: Testing the alkalinity/acidity of the soil
Testing the PH of soil. Image credit blogspot.com ZIMSEC O Level Combined Science Notes: Testing the alkalinity/acidity of the soil
Materials: Universal indicator/PH paper/PH Test meter, distilled water, test tubes, soil samples
Method
- Place the soil samples into test tubes to a height of about […]
Common types of beams and their associated forces ZIMSEC O Level Combined Science Notes: An introduction to Beams and their types
Functional organisational structure 
Ox-bow lake. Image credit
Goods in a removals warehouse. Image credit 
Harare has a sphere of influence that covers the whole country. Image credit 
Carbon can be used to reduce copper oxide
A simple AC generator. Image credit electronics-tutorials.ws ZIMSEC O Level Combined Science Notes: The Alternating Power generator