Class 9 SEBA Science Chapter 13 Solutions – Why Do We Fall Ill (2026–27) | Assam Eduverse
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SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions are prepared by Assam Eduverse strictly according to the latest SEBA / ASSEB syllabus 2026–27. These SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions are created for students searching specifically for SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions that are accurate and exam-oriented. This page provides complete SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions, making it a reliable source for SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions based on the official SEBA Class 9 Science textbook.
The SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions explain all topics included in SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions, such as health and disease, causes of diseases, infectious and non-infectious diseases, immediate and underlying causes of illness, principles of prevention, and basic concepts of immunity. These SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions help students understand theory and definitions using SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions written in simple and exam-friendly language, following the ASSEB Class 9 Science Chapter 13 solutions format.
With the complete SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions (2026–27), students can prepare SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions for intext questions and SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions for chapter-end textbook exercise questions. These SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solutions include important Why Do We Fall Ill question answers and exam-focused explanations. Assam Eduverse ensures every SEBA Class 9 Science Chapter 13 Why Do We Fall Ill solution is syllabus-based and exam-focused.
SEBA / ASSEB Class 9 Science Chapter 13 – Why Do We Fall Ill Intext Questions & Answers (Latest Syllabus 2026–27)
📝 Page 178
Q1. State any two conditions essential for good health.
Answer: Two conditions essential for good health are-
- a clean and hygienic environment, including safe drinking water and sanitation
- adequate nutrition and food security.
Q2. State any two conditions essential for being free of disease.
Answer: Two conditions essential for being disease free are-
- avoiding exposure to infectious agents through hygiene measures (handwashing, vaccination, vector control)
- maintaining strong immunity through balanced nutrition and immunisation.
Q3. Are the answers to the above questions necessarily the same or different? Why?
Answer: They differ because good health encompasses physical, mental, and social well-being, while being disease-free refers specifically to absence of identifiable disease. Good health requires broader social and environmental factors beyond mere disease prevention.
📝 Page 180
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: Three warning symptoms are
- persistent high fever
- severe, unrelenting pain
- sudden unexplained weight loss.
If only one mild symptom occurs, one might not immediately see a doctor, as many early symptoms can be self-limiting. However, any alarming or prolonged symptom warrants medical attention to rule out serious disease.
Q2. In which of the following case do you think the long-term effects on your health are likely to be most unpleasant? (a) Jaundice; (b) lice; (c) acne. Why?
Answer: (a) Jaundice, because it indicates liver dysfunction, which can lead to chronic health issues. Lice and acne are generally short-term and treatable, whereas underlying liver disease can have lasting consequences.
📝 Page 186
Q1. Why are we normally advised to take bland and nourishing food when we are sick?
Answer: Bland and nourishing food is recommended when sick because it is easy to digest and doesn’t put additional stress on the already compromised digestive system. Such food provides essential nutrients needed for recovery and energy for the immune system to fight the infection, while avoiding spicy or heavy foods that might worsen symptoms like nausea or stomach upset.
Q2. What are the different means by which infectious diseases are spread?
Answer: Infectious diseases spread through:
- Air – through droplets released when infected people cough or sneeze.
- Water – through contaminated drinking water containing disease-causing microbes.
- Direct contact – through physical contact including sexual transmission.
- Vectors – through animals like mosquitoes that carry pathogens from infected to healthy individuals.
Q3. What precautions can you take in your school to reduce the incidence of infectious diseases?
Answer: Precautions in school to reduce the incidence of infectious diseases are:
- ensuring clean drinking water supply.
- maintaining proper sanitation in toilets and classrooms.
- promoting regular handwashing among students.
- ensuring good ventilation in classrooms, keeping sick students at home until recovery.
- regular cleaning and disinfection of surfaces, and educating students about personal hygiene practices.
Q4. What is immunisation?
Answer: Immunisation is the process of making a person immune to a specific infectious disease by introducing a vaccine into the body. The vaccine contains weakened or killed forms of disease-causing microbes that stimulate the immune system to develop memory cells and antibodies without causing the actual disease. This provides protection against future infections by the same pathogen.
Q5. What are the immunisation programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?
Answer: Common immunisation programmes include vaccines for tuberculosis (BCG), diphtheria, pertussis, tetanus (DPT), polio, measles, hepatitis B, and others as per the national immunisation schedule. The major health problems vary by locality but commonly include respiratory infections, diarrheal diseases, malaria (in endemic areas), and vaccine-preventable diseases like measles and polio in areas with low vaccination coverage. Students should visit their local health centre to get specific information about their area.
SEBA Class 9 Science Chapter 13 – Why Do We Fall Ill Textbook Exercise Questions & Solutions | 2026–27
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: This is a personal reflection question. Common illnesses might include cold, fever, or stomach upset.
(a) A habit change could be washing hands regularly before eating and after using the toilet to prevent infections.
(b) An environmental change could be ensuring clean drinking water supply or better waste management in the locality to prevent water-borne 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: Healthcare workers protect themselves by following strict infection control protocols including wearing personal protective equipment (masks, gloves, gowns), practicing proper hand hygiene, maintaining vaccination schedules, following isolation procedures for infectious patients, using proper disposal methods for contaminated materials, and maintaining good personal health and nutrition to boost immunity.
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: Common diseases might include respiratory infections, diarrheal diseases, and vector-borne diseases like malaria or dengue. Three steps could be:
- Improving sanitation and waste management systems.
- Ensuring clean drinking water supply and water treatment.
- Implementing vector control measures like eliminating stagnant water sources and spraying insecticides in breeding areas.
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?
Answer: (a) Signs that a baby is sick include changes in behavior like excessive crying, loss of appetite, fever, unusual sleepiness or irritability, changes in breathing pattern, skin color changes, or unusual bowel movements.
(b) To identify the specific sickness, caretakers should observe specific symptoms, measure temperature, check for rashes or swelling, monitor eating and sleeping patterns, and consult a pediatrician who can perform proper examination and tests.
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: Option (c) – when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox. This is because her immune system is already weakened from recent malaria recovery, further compromised by fasting (lack of nutrition), and she’s exposed to another infectious disease (chicken-pox). The combination of weakened immunity, poor nutrition, and exposure to pathogens creates the highest risk of falling sick.
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: Option (c) – when your friend is suffering from measles. Measles is highly contagious and spreads easily through air droplets. Direct exposure to an infected person significantly increases the risk of contracting the disease. While stress from examinations and fatigue from travel can weaken immunity, they don’t guarantee infection unless there’s exposure to pathogens. The direct exposure to measles virus poses the highest immediate risk of falling sick
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