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NCERT Class 9 Science Chapter 13 Why Do We Fall Ill Digital Edition
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Chapter 13 Why Do We Fall Ill NCERT Book Class Class 9 PDF (2025-26)
WHY DO WE FALL ILL
1. Which one of the following is not a viral disease?
(a) Dengue
(b) AIDS
(c) Typhoid
(d) Influenza
2. Which one of the following is not a bacterial disease?
(a) Cholera
(b) Tuberculosis
(c) Anthrax
(d) Influenza
3. Which one of the following disease is not transmitted by mosquito?
(a) Brain fever
(b) Malaria
(c) Typhoid
(d) Dengue
4. Which one of the following disease is caused by bacteria?
(a) Typhoid
(b) Anthrax
(c) Tuberculosis
(d) Malaria
5. Explain giving reasons
(a) Balanced diet is necessary for maintaining healthy body.
(b) Health of an organism depends upon the surrounding environmental conditions.
(c) Our surrounding area should be free of stagnant water.
(d) Social harmony and good economic conditions are necessary for good health.
6. What is a disease? How many types of diseases have you studied? Give examples.
7. What do you mean by disease symptoms? Explain giving two examples?
8. Why is immune system essential for our health?
9. What precautions will you take to justify “prevention is better than cure”.
10. Why do some children fall ill more frequently than others living in the same locality?
11. Why are antibiotics not effective for viral disease?
12. Becoming exposed to or infected with an infectious microbe does not necessarily mean developing noticeable disease. Explain.
13. Give any four factors necessary for a healthy person.
14. Why is AIDS considered to be a ‘Syndrome’ and not a disease?
Please refer to attached file for NCERT Class 9 Science Why Do We Fall Ill Questions
| NCERT Book Class 9 Science Matter In Our Surroundings Questions |
| NCERT Book Class 9 Science Matter In Our Surroundings |
| NCERT Book Class 9 Science Is Matter Around Us Pure Questions |
| NCERT Book Class 9 Science Is Matter Around Us Pure |
| NCERT Book Class 9 Science Atoms And Molecules Questions |
| NCERT Book Class 9 Science Atoms And Molecules |
| NCERT Book Class 9 Science Structure Of The Atom Questions |
| NCERT Book Class 9 Science Structure Of The Atom |
| NCERT Book Class 9 Science The Fundamental Unit Of Life Questions |
| NCERT Book Class 9 Science The Fundamental Unit Of Life |
| NCERT Book Class 9 Science Force And Laws Of Motion Questions |
| NCERT Book Class 9 Science Force And Laws Of Motion |
| NCERT Book Class 9 Science Gravitation Questions |
| NCERT Book Class 9 Science Gravitation |
| NCERT Book Class 9 Science Work And Energy Questions |
| NCERT Book Class 9 Science Work And Energy |
| NCERT Book Class 9 Science Improvement In Food Resources Questions |
| NCERT Book Class 9 Science Improvement In Food Resources |
| NCERT Book Class 9 Science Why Do We Fall Ill Questions |
| NCERT Book Class 9 Science Why Do We Fall Ill |
| NCERT Book Class 9 Science Natural Resources Questions |
| NCERT Book Class 9 Science Natural Resources |
| NCERT Book Class 9 Science Solutions and Answers |
| NCERT Book Class 9 Science Diversity In Living Organisms Questions |
| NCERT Book Class 9 Science Diversity In Living Organisms |
Free study material for Science
NCERT Book Class 9 Science Chapter 13 Why Do We Fall Ill
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