Class 9th Science Chapters - English Medium 1. Laws of Motion 2. Work and Energy 3. Current Electricity 4. Measurement of Matter 5. Acids, Bases, and Salts 6. Classification of Plants 7.Energy Flow in an Ecosystem 8. Useful and Harmful Microbes 9. Environmental Management 10. Information Communication Technology (ICT) 11. Reflection of Light 12. Study of Sound 13. Carbon: An Important Element 14. Substances in Common Use 15. Life Processes in Living Organisms 16. Heredity and Variation 17. Introduction to Biotechnology 18. Observing Space: Telescopes