NCERT Solutions(Intext and Exercise) for Why do we fall ill

In this page we have NCERT intext and Exercise solutions for Class 9 Why do fall ill . Hope you like them and do not forget to like , social shar and comment at the end of the page.

NCERT intext Solutions

Question 1
State any two conditions essential for good health.
Two conditions that are essential for good health are:
1. Proper nutrition and a balanced diet
2. Good Social environment.

Question 2
State any two conditions essential for being free of disease.
Two conditions essential for being disease-free are:
1. Person should take balance diet which is mixture of nutrients and carbohydrate
2. Personal and community hygiene.

Question 3
Are the answers to the above questions necessarily the same or different? Why?
To some extent they are the same, because if the conditions that are essential for good health are maintained, then automatically the chances of getting a disease will be minimized. But at the same time, we can say that they are different because being health or good health means physical, mental and social well-being while being disease-free means not suffering from a particular disease.

Question 4
List any three reasons why you would think that you are sick and ought to see a doctor. If only one of these symptoms were present, would you still go to the doctor? Why or why not?
Common symptoms which indicate sickness are:
1. Headache
2. Cough
3. Dysentery
4. Vomiting
5. Fever

If many of these symptoms are present, we feel that sickness thing and we usually go to doctor to check  for that
If only one of these symptoms is present, we usually do not visit a doctor. This is because such symptoms do not have much effect on our general health and ability to work. However, if a person is experiencing these symptoms for quite some time, then he needs to visit a doctor for proper treatment.

Question 5
In which of the following case do you think the long-term effects on your health are likely to be most unpleasant?
1.If you get jaundice.
2.if you get lice.
3.If you get acne.
Jaundice is a disease that can cause long-term effects on our health. It is a chronic disease that lasts for a long period of time. Jaundice does not spread rapidly, but it develops slowly over a period of time.

Question 6
Why we are normally advised to take bland and nourishing food when we are sick?
When we are sick the normal body functions get disturbed. In such situation food that is easily digestible and contains adequate nutrients are required for the speedy recovery. Thus bland and nourishing food is given during sickness.

Question 7
What are the different means by which infectious diseases are spread?
The different modes of transmission of infectious diseases are:
NCERT Solutions(intext and Exercise)  for Why do fall ill Chapter 13 Class 9 Science

Question 8
What precautions can you take in your school to reduce the incidence of infectious diseases?
Precautions to reduce incidence of infectious diseases are:
1. Staying away from the infected person.
2. Covering mouth or nose while coughing or sneezing to prevent the spread of disease.
3. Drinking safe water.
4. Keeping the school environment clean to prevent multiplication vectors.

Question 9
What is immunization?
Immunizationis defined as protection of the body from communicable diseases by administration of some agent that mimics the microbe. This suspension of killed microbes that mimics the disease-causing microbes is known as vaccine

Question 10
What are the immunization programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?
The immunization programmes available at the nearest health centre are DPT (Diphtheria, Pertusis, and Tetanus), polio vaccine, hepatitis B, MMR (Measles, Mumps, and Rubella), jaundice, typhoid, etc.
Of all these diseases, jaundice and typhoid are major health problems.

NCERT Exercise Solutions

Question 1
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.
The following precautions must be taken by a doctor/ nurse/ health-worker:
1. Wearing a mask when in contact with a diseased person.
2. Keeping yourself covered while moving around an infected place.
3. Drinking safe water.
4. Eating healthy and nutritious food.
5. Ensuring proper cleanliness and personal hygiene.

Question 2
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?
(a) The baby is sick can be determined by his/her behavioural changes such as constant crying of baby, improper intake of food, frequent mood changes, etc.
(b) The sickness is determined by symptoms or indications that can be seen in the baby. The symptoms include vomiting, fever, loose motion, paleness in the body, etc.

Question 3
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.
(c)A person is more likely to fall sick when she is on a four day fast after recovering from malaria and is taking care of someone who is suffering from chicken pox. This is because she is fasting during recovery, and her immune system is so weak that it is not able to protect its own body from any foreign infection. If she is taking care of someone suffering from chicken pox, then she has more chances of getting infected from chicken pox virus and will get sick again with this disease.

Question 14
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.
(c)You are more likely to fall sick when your friend is suffering from measles. This is because measles is highly contagious and can easily spread through respiration i.e., through air. Thus, if your friend is suffering from measles, stay away from him otherwise you might easily get infected with the disease.
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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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