The Science syllabus of Class 9 CBSE is quite vast for students who have just entered the Secondary level. The chapters included in the science book are remotely related to what you have studied before. You will have to dig a little deeper into the concepts by studying these chapters and learn how to answer various questions. One of the prime chapters related to Biology is Why Do We Fall Ill Class 9. You will find excellent information related to our health, diseases and pathogens causing them. It will also tell us how these diseases can be managed and treated. There are specific questions in the exercises in this chapter that will test your understanding. Register Online for Class 9 Science tuition on Vedantu.com to score more marks in your examination. Vedantu is a platform that provides free NCERT Solutions and other study materials for students. Maths Students who are looking for better solutions. They can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.