Included is the first half of the chapters and excursions of the Intermediate Science Curriculum Study materials designed for grade eight students. Although I.S.C.S. is an integrated science course, most of the concepts developed in this volume relate to chemistry. Introductory notes to the student explain how the book is to be used. Each chapter starts with a short statement of the general problem to be investigated then concepts are developed through laboratory activities. The workbook format gives instructions for activities interspersed with questions and spaces for answers. The instructions and some of the questions are illustrated and data tables are provided for students to fill out. "Checkup frames" are included at intervals, and students may be directed from these to remedial excursions. Students are directed to other excursions at suitable points in case they wish to explore certain ideas further. (EB)