This science curriculum is a basic science program suitable for middle or junior high school science classes. The book is designed for use as a "worktext" or text book and emphasizes a wide range of science skills and concepts to provide students with post-school knowledge and the ability to successfully complete a proficiency or a standardized competency exam in science. This combined teacher annotated edition provides competency guide references for content understandings and core process skills, correct responses to student activities, answers to all text questions and puzzles, complete glossary and index, three "word parts" listings (dealing with meanings of common word parts), and unit exams and final unit exams with question origination identification codes and complete answers. Activities are organized into units and feature one of seven key concepts: skills, concept building, product/process, benefit/burden, advantage/disadvantage, applications, and home. Unit topics include: (1) living things: organisms (reproduction, needs of living things, habitats, and environment); (2) living things: humans (body systems); (3) living things: organisms (cells, microorganisms, and product safety); (4) Earth's changing surface (minerals, oceans, weathering, and Earth's history); (5) weather and climate; (6) astronomy; (7) energy; (8) the chemistry of matter; and (9) energy: sources and issues. (LZ)