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Extra Questions for Why do we fall ill |Class 9 Science(Biology)





Given below are the Class 9 Science(biology) Extra Questions for Why do we fall ill
a. Concepts questions
b. Multiple choice questions
c. Short answer questions
d. Fill in the blanks

Concepts questions/Short answer questions

1. State two principles of treatment of a disease?
2. Name the causative agent for (i) Typhoid and (ii) Malaria?
3. Write three precautions you can take in your school to reduce the incidence of infectious diseases?
4. Differentiate between congenital disease and acquired disease?
5. “When we think about health, we think about community but when we think about disease, we think about individual sufferer”. Do you agree? Comment with two example?
6. Why social harmony and good economic conditions are necessary for good health?
7. Give the ways by which microbial agents can commonly move from an infected person to someone else for the following disease:
a) Cholera
b) Pneumonia
c) Common cold
d) Malaria
e) Fungal infection
8. An active immune system forms many cells to the affected tissue to kill off the disease causing microbes. Identify the process and mention its local and general effects?
9. Name the system which is responsible for fighting on incoming pathogen?
10. What are the different means by which infectious diseases are spread?


11. Which disease cause more effects on general health- acute or chronic?
12. Common cold spread faster and is difficult to control. Give reason?
13. What is AIDS? What are the common methods of transmission of AIDS? AIDS patient should not be demeaned in the society. State reason?
14. You have suffered from chicken pox, when you were in class three. Why will you not suffer from it again?
15. Many vaccines form the public health programme of childhood immunization for preventing infectious disease. Name any two such diseases?
16. “Educating parents would help a lot in reducing the incidences of disease in children”. Justify the statements with reasons?
17. What is immunization?
18. Why villagers suffer with cholera more than urban people?
19. Write the causative agents of following:
a. Kala-azar
b. Acne
c. Sleeping sickness
d. Rabies
e. SARS
20. What causes Japanese encephalitis? How it can be prevented?
21. Tabulate three differences between acute and chronic diseases?
22. What are the various ways to prevent the disease?
23. “Antibiotics are not effective for viral diseases”. Justify this statement?
24. Name any two diseases which are caused due to unprotected sexual intercourse?
25. What type of disease can be prevented through vaccination?

Fill in the blanks

26.Fill in the blanks
(a) ____ disease continues for many days and causes _____on body.
(b) _____disease continues for a few days and causes no longer term effect on body.
(c) ______is defined as physical, mental and social well-being and comfort.
(d) Common cold is _____disease.
(e) Many skin diseases are caused by _____.

Multiple choice questions

27.You are aware of Polio Eradication Programme in your city. Children are vaccinated because
(a) vaccination kills the polio causing micro-organisms
(b) prevents the entry of polio causing organism
(c) it creates immunity in the body
(d) all the above
28. Viruses, which cause hepatitis, are transmitted through
(a) air
(b) water
(c) food
(d) personal contact
29. Vectors can be defined as
(a) animals carry the infecting agents from sick person to another healthy person
(b) micro-organisms which cause many diseases
(c) infected person
(d) diseased plants

30. Which disease is not transmitted by mosquitoes?
(a) Dengue
(b) Malaria
(c) Brain fever or encephalitis
(d) Pneumonia



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Class 9 Maths Class 9 Science
Reference Books for class 9 science

Given below are the links of some of the reference books for class 9 science.

These books by S.Chand Publications are detailed in their content and are must have books for class 9 students.
  1. Science for Ninth Class Part1 Physics
  2. Science for Ninth Class Part2 Chemistry
  3. Science for Ninth Class Part3 Biology
Some other books that might be worth considering are
  1. Oswaal CBSE Question Bank Class 9 Science Chapterwise & Topicwise We all know importance of practicing what we have studied. This book is perfect for practicing what you have learned and studied in the subject.
  2. Pearson Foundation Series (IIT-JEE/NEET) Physics, Chemistry, Maths & Biology for Class 9 (Main Books) | PCMB Combo These Foundation books would be helpful for students who want to prepare for JEE/NEET exams. Only buy them if you are up for some challenge and have time to study extra topics. These might be tough for you and you might need extra help in studying these books.
  3. Foundation Science Physics for Class - 9 by H.C. Verma This is one of my favorite Physics book for class 9. Most of the book is within the limits of CBSE syllabus. It might overwhelm you with its language but I feel if you can understand the content is authentic with plenty of problems to solve.

You can use above books for extra knowledge and practicing different questions.







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