Chemical weathering involves the change in the composition of rocks, often leading to a 'break down' in its form. This is done through a combination of water and various chemicals to create an acid which directly breaks down the material.
Zimbabwe is often reported to have the highest adult literacy rate on the continent. A recent news article claimed that 90% of the population is literate. The data does not back up the claims. Researched by Kate Wilkinson.
When immigration revived in 1919 and 1920, the numbers were large, and the immigrants were still from the âwrongâ part of Europe, the south and the east, which suggested that the literacy test did not achieve the goals of its proponents, viz., favoring immigration from northern and western Europe.