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.
1 Canada gets a âCâ and ranks 4th out of 13 countries on the percentage of adults scoring high on adult literacy rate tests. 2  Between 1994 and 2003, the proportion of Canadian adults with high literacy skills fell from 24 per cent to 20 per cent.