Testing for organisms in the soil. ZIMSEC O Level Combined Science Notes: Experiment: Testing for the presence of micro-organisms in soil
Material:2 test tubes, lime water/bicarbonate indicator, cotton thead, corks, muslin cloth or cotton material, burner
Method
The three states of matter and volume. Image credit ucdavis.edu ZIMSEC O Level Combined Science Notes: The relationship between volume and state
Solids
Image credit bhofinance.com ZIMSEC O Level Principles of Accounts Notes: Simple Trading and Profit and Loss Account Example 2
From the following trial balance of J Nhiwatiwa after his first year’s trading, you are required to
draw up a trading and profit and loss account for the year ended […]
Piet Grobbler was one of the whites that signed a treaty with Lobengula. image credit boostdam.net ZIMSEC O Level History Notes:The Colonisation of Zimbabwe:The whites involved in the signing of treaties and concessions in Zimbabwe […]
ZIMSEC O Level Combined Science Notes: Chemical Reactions
Introduction to reactions
ZIMSEC O Level Combined Science Notes: Experiment: The reaction of metals with dilute acids
Universal indicator results showing the pH of various solutions. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: The pH scale
The pH colour chart. Image […]
Steel beams. Image credit risleysteelservices.ca ZIMSEC O Level Combined Science Notes: Steel making
Tin plating is used in making food cans. Image credit alsagerfoodbank.org.uk ZIMSEC O Level Combined Science Notes: Summary of plating and its uses
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, […]
