We have completed the NCERT/CBSE Solutions chapter-wise for Class 9 Science Chapter 13 Why Do We Fall Ill? with Answers by expert subject teacher for latest syllabus and examination. Prepare effectively for the exam taking the help of the Class 9 Science NCERT Solutions PDF free of cost from here. Students also can take a free NCERT Solutions of Why Do We Fall Ill?. Each question has right answer Solved by Expert Teacher. Download the Science NCERT Solutions with Answers for Class 9 Science Pdf and prepare to help students understand the concept very well.
NCERT Solutions for Class 9 Science Chapter wise
Questions
Q1. State any two conditions essential for good health.
Answer: Two conditions that are essential for good health are:
- Proper nutrition and a blanced diet
- Good Social environment.
Q2. State any two conditions essential for being free of disease.
Answer: Two conditions essential for being free of disease are:
- Personal and domestic hygiene.
- Clean environment and surroundings.
Q3. Are the answers to the above questions necessarily the same or different? Why?
Answer: Different: Health is a state of perfect physical, mental, and social well being of a person while disease is a state of disease or discomfort of the body or its part.
Questions
Q1. 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?
Answer: The presence of symptoms such as headache, stomach pain, nausea, vomiting, fever, etc., make us feel that we are sick and must visit a doctor. It will be difficult for us to predict the kind of disease and end up visiting the doctor so that the disease can be treated with proper medication. However, we usually do not visit a doctor, if only one of these symptoms is present. This is because such symptoms do not have much effect on our general health and ability to work. So, if a person is experiencing these symptoms quite regularly, then he/she needs to visit a doctor for proper treatment because that may be a symptom of severe disease.
Q2. In which of the following case do you think the long-term effects on your health are likely to be most unpleasant?
- If you get jaundice,
- if you get lice,
- If you get acne.
Answer: 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.
Questions
Q1. Why we are normally advised to take bland and nourishing food when we are sick?
Answer: 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.
Q2. What are the different means by which infectious diseases are spread?
Answer: Infectious diseases are generally spread through the following modes – Water, air, vector such as mosquito, sexual contact, physical contact with the affected, or by using affected person’s clothes, bedding, utensils, etc.
Q3. What precautions can you take in your school to reduce the incidence of infectious diseases?
Answer:
- Airy and well-spaced classrooms.
- Advising students falling sick not to come to school. If any such student does come, the same should be provided a separate bench.
- Ensuring safe drinking water.
- Cleanliness.
- Protection against flies and mosquitoes.
- Vaccination against diseases.
- Regular medical examination of students.
Q4. What is immunization?
Answer: Immunization is a process of protecting the body from communicable diseases by administration of the agent that mimics the microbe.
Q5. 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?
Answer: he immunisation 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.
Exercise
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.
Answer: I fell ill twice in the last year. I suffered from diarrhoea first and then dengue 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.
Answer: Through
- vaccination against most of the common diseases,
- use of gloves,
- use of different dress or coat while visiting patients, and
- use of disposable syringes and needles.
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.
Answer: ter conducting a survey in our neighborhood the three most common diseases found are Dengue, Typhoid, Jaundice. etc. The steps to be taken to bring down the incidence of these diseases are:
- Proper disposal of garbage so that a clean environment should be provided.
- Proper maintenance of open sewage systems and canals.
- The supply of safe drinking water must be ensured.
- The breeding of mosquitoes must be prevented.
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?
Answer: (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) what is the sickness?
Answer:(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.
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?
Answer: 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 the 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. At this stage, if she is taking care of someone suffering from chicken -pox, then she has more chances of getting infected with the chicken-pox virus and will get sick again with this disease.
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?
Answer: 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.
We Think the given NCERT Solutions for class 9 Science book Chapter 13 Why Do We Fall Ill? with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 9 Science Why Do We Fall Ill? NCERT Solutions with Answers, drop a comment below and that we will come back to you soons.