Section 1. Biology: 1. Cells: the body's building blocks; 2. Reproduction; 3. Environment and feeding relationships; 4. Variation and classification; Section 2. Chemistry: 5. Acids and alkalis; 6. Simple chemical reactions; 7. Particle model: solids, liquids and gases; 8. Solutions; Section 3. Physics: 9. Energy resources; 10. Electrical circuits; 11. Forces and their effects; 12. The Solar System and beyond; Summaries; Glossary/index; Acknowledgements.