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.
Largest Continents Ranked by Population. 1  Asia - 4,055,000,000 (Over 4 billion) 2  Africa - 1,108,500,000 (Over 1 billion) 3  Europe - 729,871,042 (including all of Russia)  North America 1  - 522,807,432. South America - 379,919,602.  Australia - 20,434,176.