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NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill?

Here you will get NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill will improve your awareness skills sharply and you can easily memorize more things precisely. It will let you explore answers of those questions which you're finding difficult to solve. Students should also refer previous year questions and practise test papers and worksheets to assess their key areas.

Given NCERT Solutions are available in understandable language and encourage students to learn new topics. Chapter 13 Why Do We Fall Ill NCERT Questions and Answers will be able to develop the higher-order thinking capabilities that will help you in prioritising your understandings.

NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill?

NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill?


Through these Science NCERT Solutions, students should not waste time and allow students to cover the entire syllabus effectively without any frustration. It will improve your awareness skills sharply and you can easily memorize more things precisely. It help the students in learning complex topics and problems in an easy way. Students can cross check their answers and also whether they learned it properly or not with the help of these NCERT Questions and answers.


In text Questions

Page No: 178

1. 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.

2. State any two conditions essential for being free of disease.

Answer

Two conditions essential for being disease-free are:
→ Person should take balance diet.
→ Personal and community hygiene.

3. Are the answers to the above questions necessarily the same or different? Why?

Answer

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.

Page No: 180

1. 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

Common symptoms which indicate sickness are:
→ Headache
→ Cough
→ Dysentery

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 sometime, then he needs to visit a doctor for proper treatment.

2. 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.

Page No: 187

1. 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.

2. What are the different means by which infectious diseases are spread?

Answer

The different modes of transmission of infectious diseases are:
→ Through Air: Certain disease-causing micro-organisms are expelled in air by coughing, sneezing, talking, etc. These micro-organisms can travel through dust particles or water droplets in air to reach other people. For example, tuberculosis, pneumonia, etc. spread through air.
→ Through Water: Sometimes causal micro-organisms get mixed with drinking water and spread water borne diseases. Cholera for example is water borne disease.
→ Through Sexual Contact: Sexual act between two people can lead to the transfer of diseases such as syphilis, gonorrhoea, AIDS, etc.
→ Through Vectors: Certain diseases spread by animals called vectors. For example mosquitoes spread malaria.

3. What precautions can you take in your school to reduce the incidence of infectious diseases?

Answer

Precautions to reduce incidence of infectious diseases are:
→ Staying away from the infected person.
→ Covering mouth or nose while coughing or sneezing to prevent the spread of disease.
→ Drinking safe water.
→ Keeping the school environment clean to prevent multiplication vectors.

4. What is immunization?

Answer

Immunizationis defined as protection of the body from communicable diseases by administration of some agent that mimics the microbe.

5. 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

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.

Page No: 188

2. 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

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

4. 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) 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.

5. 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.

Answer

(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.

6. 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

(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.

Go Back To NCERT Solutions for Class 9 Science

Chapter 13 Why Do We Fall Ill Class 9 NCERT Solutions


These NCERT Solutions are also useful for competitive exams and higher grades. It will prepare students to do better during immense pressure and at the same time make them fresh and enhances memory. You can pinpoint your weaknesses and prepare accordingly to change it in a positive way with the help of Chapter 13 Class 9 NCERT Solutions.

Topics in the Chapter

• Health and its Failure
→ The Significance Of ‘health’
→ Personal And Community Issues Both Matter For Health
→ Distinctions Between ‘Healthy’ And ‘Disease-free’
• Disease and Its Causes
→ What Does Disease Look Like?
→ Acute And Chronic Diseases
→ Chronic Diseases And Poor Health
→ Causes Of Diseases
→ Infectious And Non-infectious Causes
• Infectious Diseases
→ Infectious Agents
→ Means Of Spread
→ Organ-specific And Tissue-specific Manifestations
→ Principles Of Treatment
→ Principles Of Prevention

These NCERT Solutions are curated by the experts in a comprehensive which can be helpful in clearing your doubts instantly. You can study in an organized manner and outperform your classmates. It will help you in analyzing the problems and answering it with precision and the right concepts. These Class 9 NCERT Solutions are prepared as per the accordance of latest CBSE guidelines so you can score maximum marks.


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