Covers everything you need for the AQA Chemistry AS specification, including the skills required for How Science Works and practical assessment. Learning Objectives clearly referenced to the specification throughout tell you exactly what you need to learn and understand in each topic. Includes activities to practice investigative skills with detailed notes on practical experiments. Extension materials also provide extra challenges, helping to develop key skills. Maths Skills worksheets and activities with worked examples provide practice for calculations and maths in a chemistry context.