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

Worksheet For class 9

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

CLASS-9

BOARD: CBSE

BIOLOGY Worksheet - 8

TOPIC: Why Do We Fall Ill

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

1. A disease widely spread worldwide is known as:
   1. Endemic
   2. Epidemic
   3. Pandemic
   4. Sporadic
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. Common cold and influenza are one and the same.
   2. AIDS is not transmitted by contact with a patient’s clothes.
   3. Mumps and Poliomyelitis are bacterial diseases.
   4. Goitre is endemic in sub-Himalayan regions of India.
5. Name the following:
   1. Category of pathogen that causes diseases like common cold and mumps.
   2. The vaccine for preventing tuberculosis.
   3. The popular name of the disease pertusis.
6. Define the terms:
   1. Pathogen
   2. Allergen
7. State any two conditions essential for being free of disease
8. Give the differences between acute and chronic diseases.
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?