Book excerpt: It is a common sentiment expressed by many students from time to time. The answer to this is simple. Taking an exam is an art and only he who approaches the task in a more systematic and scientific manner comes out a winner. One common aspect of the exam-taking strategy is revision. The ability to answer random questions about your subject can clearly demonstrate the extent of your preparation. Now this book makes revision easier and convenient for all science students. Written by leading experts in the field, it helps students with quick revisions in one-line questions with one-word answers.