Appearing throughout this book, these help you develop practical skills which are essential for studying Cambridge International AS & A Level Chemistry. The investigations contain an introduction which outlines the theory behind the practical work, a list of equipment, important safety advice to ensure you stay safe whilst conducting practical work, a step-by-step method, space to record your results, and, finally, analysis, conclusion and evaluation questions, which help you to interpret your results. The later chapters also contain planning investigations, which allow you to practice planning your own practical work, and data analysis investigations, which provide further opportunities to enhance your analytical thinking.