Based on the revised 1995 National Curriculum for science, this workbook covers all the main concepts required for Key Stage 4 and the latest GCSE examinations. The information is grouped into the four attainment targets given in the National Curriculum and is presented at both Foundation and Higher level. Students are encouraged to: underline key phrases; list the meaning of words; match statements; complete diagrams; perform calculations; and give extra examples. The answers are given at the back of the book to help students who are studying at home.