NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Written by Team Trustudies
Updated at 2021-05-07
NCERT solutions for class 9 Science Chapter 13 Why Do We Fall Ill Exercise Questions
Q1 ) How many times did you fall ill in the last one year? What were the illnesses?
(a). Think of one change you could make in your habits in order to avoid any of/most of the above illnesses.
(b). Think of one change you would wish for in your surroundings in order to avoid any of/most of the above illnesses.
NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Answer :
I fell ill maybe 50 times in the last year. I suffered from cold, cough and fever.
(a) The changes made by me in my habits after suffering from these diseases are:
(i) I will always drink purified and clean water and wash my hands before eating any food item.
(ii) I will live in a clean environment where disease spreading vectors will not multiply.
Example of multiplying vectors are mosquitoes.
(b) One change I would wish for in our surroundings in order to have a healthy society is by making pure drinking water available for the people. Consuming impure water is the root cause of many infectious diseases.
Q2 ) A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself.
NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Answer :
Some important precautions that need to be taken by the doctor/nurse/health-worker while treating people who are sicker than others in the community are :
(a) When in contact with a diseased person not to forget to wear a mask.
(b) Drinking purified water.
(c) Not neglecting cleanliness and personal hygiene.
(d) Keeping themselves covered appropriately when moving in an infected region
(e) Eating nutritious food and maintaining a healthy diet.
Q3 ) Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.
NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Answer :
The following three are the most common diseases in any neighbourhood:
Cold and cough, malaria, fever.
Some of the preventive measures that can be taken are:
(a) By drinking fresh, uncontaminated, and clean water.
(b) By maintaining hygienic sanitary conditions.
(c) By educating people about various preventive measures with the help of posters, and pamphlets.
Q4 ) A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out
(a) that the baby is sick?
(b) what is the sickness?
NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Answer :
(a). It can be found out by observing the behavioral changes of the child such as:
Improper food intake
Constant crying
Mood changes frequently
(b). The sickness can be determined with the help of symptoms or indications shown by the child. The symptoms could be loose motion, vomiting, paleness in body, and fever.
Q5 ) Under which of the following conditions is a person most likely to fall sick?
(a) when she is recovering from malaria.
(b) when she has recovered from malaria and is taking care of someone suffering from chicken-pox.
(c) when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox. Why?
NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Answer :
In condition (c) she is more likely to fall sick as she has just recovered from malaria but her immune system is still weak and she is not taking proper diet. At this stage her body will not be able to fight against infection and if she is taking care of someone else suffering from chicken pox even she can get infected with chickenpox virus and will fall sick again.
Q6 ) Under which of the following conditions are you most likely to fall sick?
(a) when you are taking examinations.
(b) when you have travelled by bus and train for two days.
(c) when your friend is suffering from measles. Why?
NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill
Answer :
A person can most likely fall sick when his/her friend is suffering from measles. It can easily be transferred through air and respiration. It is always better to stay away from your friend who is affected with measles else even you will get infected with the disease.
