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CBSE Class 9 Science | Chapter 13 Why Do We Fall Ill | Handwritten Notes | NCERT | Padhaku Dekisugi

📍Looking for *Class 9 Science Chapter 13 handwritten notes**? This video presents clear, concept-based, and NCERT-aligned **handwritten notes* on *Why Do We Fall Ill**. These **Class 9 Science notes* help you understand the causes of diseases, types of diseases, and how to maintain health in a simple and engaging format.

🧠 *What’s Covered in This Video:*
– Health and its significance
– Difference between healthy and disease-free
– Acute and chronic diseases
– Infectious and non-infectious diseases
– Causes of diseases: biological agents, lifestyle, environment
– Immunity, vaccination, and disease prevention
– Full *Class 9 Science Chapter 13 notes* with examples and mind maps

🎯 *Important Questions from Chapter 13 – Why Do We Fall Ill*
1. What is the difference between being healthy and being disease-free?
2. Define acute and chronic diseases with examples.
3. What are infectious diseases? How do they spread?
4. Explain the role of vaccination in disease prevention.
5. How does poor health affect our daily lives?

🔑 *Important Keywords from Chapter 13:*
Health
Disease
Acute & Chronic
Infectious & Non-Infectious
Pathogens
Immunity
Antibiotics
Vaccination
Vectors
Public Health

📚 These *Class 9 Science handwritten notes* explain all concepts clearly and are perfect for board exams, classroom tests, and quick revision before exams.

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