Designed to help secondary school students understand and become able to use the "language" of the scientist, which the author defines as including both vocabulary and thought processes and laboratory procedures, this book attempts to show that the reporting of scientific investigations has both a manageable pattern and a structure. Scientific language in general is considered and then specifically, the languages of the individual sciences, the language of mathematics in science, and the language of the laboratory. Also explicitly dealt with are science investigations for students themselves. Each of the early chapters has a section of questions, problems, and suggestions for building vocabulary. Chapter titles are Language and Communication; The Language of the Sciences: Biology, Chemistry, Physics, Earth and Space Sciences; The Language of the Laboratory; The Language of Mathematics in Science; and Practicing the Language of Science. Two appendices are also included: Greek Alphabet, Terms, Units of Measure, Chi-Square; and Answers to Problems and Questions. (PEB)