Composition. There are four passages, they may be excerpts from a novel, an article on construction of an unknown material-advertisements/brochures. You have to answer around 6 questions on the passage. Four passages sound easy peasy to comprehend and answer within an hour, right? Every passage 500-900 in words.Haa..haa.. Bugdet your time. So,I advise you to read the questions first.
(Writing and reading components for the Academic Version are more difficult than those of General Training)
Every component will be awarded a 'band' but the overall score is the one needed for most applications. Some universities do want specific scores for each of the component though.