A structured course in physical science meeting the requirements for this subject of the Kenya Junior Secondary Examination and the Junior Certificate Examination (Malawi) school *experiments, background reading and questions within the text, are used to develop the understanding of fundamental principles and their application *examples are drawn especially from East Africa and Malawi *care has been taken to present the course in simple language appropriate to students whose mother tongue is not English *SI units and IUPAC naming of chemicals have been used *the book is supported by a comprehensive Teacher's Guide