Suitable for both concept- and context-led approaches, this book features: *'ResultsPlus' Examiner feedback which draws on past exam data to help students avoid common pitfalls and build better answers. *Exam-style questions - including the multiple-choice style - to offer plenty of practice ahead of the exam. *Worked examples that provide step-by-step guidance on how to tackle exam questions. *Guidance on Practical Assessment helps students to write better AS visit/case study and practical reports. *Thinking tasks, quick questions and checklists enable students to track their own progress and revise more effectively.