Following the latest AQA GCSE Science specifications, this revision guide uses an accessible and concise approach to recap the essential kwledge you need to succeed in your course. A checklist at the end of each unit clearly lists what students need to know and breaks revision down into manageable sections. Practice questions and study tips help prepare students for their exams. Key points show you what you should kw about a topic with key words highlighted. Mathematical skills that are needed for the exams are highlighted and supported with short, visual explanations.