9th Science & Technology Chapter List 9th Science & Technology Ch 1. Laws of Motion → Ch 2. Work and Energy → Ch 3. Current Electricity → Ch 4. Measurement of Matter → Ch 5. Acids, Bases and Salts → Ch 6. Classification of Plants → Ch 7. Energy Flow in an Ecosystem → Ch 8. Useful and Harmful Microbes → Ch 9. Environmental Management → Ch 11. Reflection of Light → Ch 12 Study of Sound → Ch 13. Carbon An important element → Ch 14. Substances in Common Use → Ch 15. Life Processes in Living Organisms → Ch 17. Introduction to Biotechnology → Did this chapter match your Syllabus ? 👍 Match 👎 Not Match