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.
What state has the highest illiteracy rate in the us? California has the highest illiteracy rate in the US. This is because the state hosts the largest migrant population (over 1/4 of the state's population is foreign born), and â¦ nearly half the state's population speaks another language than English at home.