Define it

Every real 2-mark "define the term" and "using one example, briefly explain" question from the AQA AS papers. They are good practice for the A level too: the same precise definitions earn the marks in the outline questions. Say the answer out loud (or write it), open the mark scheme, tap the marks you'd get. The examiners' usual complaint is a definition that repeats the term, or an example with no explanation.