A French-language secondary-school science textbook designed for the lycée curriculum, this volume covers the core concepts students encounter in physics and chemistry at the upper-secondary level. The work is structured as an instructional resource, supporting learners as they build understanding of scientific principles and applications through systematic explanations and practice. Its scope reflects the breadth of the subject pairing, making it suitable for students preparing for coursework and examinations, as well as teachers seeking a reference aligned with secondary science study. The 2000 paperback edition presents the material as a substantial single-volume text, emphasizing foundational knowledge and classroom use rather than popular science narrative.