This fifth edition covers the entire new IB syllabus including all options at both Standard and Higher levels. It includes a chapter on the role of physics in the Theory of Knowledge along with many discussion questions with answers. There is a range of questions at the end of each chapter with answers at the back of the book. The book also includes worked examples and answers throughout, and highlights important results, laws, definitions and formulae. It has also been updated to include coverage of Particle Physics, Simple Harmonic Motion, Global Environment, Digital Technology and Communication.