ICSE Worksheet for chapter-8 Why Do We Fall Ill class 9

Worksheet For class 9

Find ICSE Worksheet for chapter-8 Why Do We Fall Ill class 9



BIOLOGY Worksheet - 8

TOPIC: Why Do We Fall Ill

For other ICSE Worksheet for class 9 Science check out main page of Physics Wallah.

  1. The letter ‘B’ in the name B.C.G. vaccination stands for:
    1. Brief
    2. Beri-beri
    3. Bacteria
    4. Bacillus
  2. Use of disposable syringes for injecting medicines, etc. is specially advised to prevent:
    1. Poliomyelitis
    2. Mumps
    3. Rabies
    4. AIDS
  3. A person has developed interferon in his body. He seems to carry infection of –
    1. Tetanus
    2. Malaria
    3. Measles
    4. Typhoid
  4. State whether the following statements are true (T) or false (F):
    1. HIV is a serious disease, usually fatal.
    2. Hay fever and asthma are allergies.
    3. Smallpox still occurs in India.
    4. Rabies, smallpox and influenza belong to the category of bacterial diseases.
  5. Name the following:
    1. Germ of germ-substance introduced into the body to prevent occurrence of an infectious disease.
    2. The disease caused by an infected dog, and which affects the central nervous system.
    3. The popular name of the disease pertusis.
  6. Define the terms:
    1. Incubation period
    2. Allergen
  7. What are congenital diseases? Give two examples.
  8. What are the different means by which infectious diseases are spread?
  9. What is immunization?
  10. Under which of the following conditions are you most likely to fall sick?
    1. when you are taking examinations.
    2. when you have travelled by bus and train for two days.
    3. when your friend is suffering from measles. Why?


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