• School
  • Engineering and Architecture
  • Management and Business Administration
  • Medicine and Allied Sciences
  • Law
  • Animation and Design
  • Media, Mass Communication and Journalism
  • Finance & Accounts
  • Computer Application and IT
  • Pharmacy
  • Hospitality and Tourism
  • Competition
  • Study Abroad
  • Arts, Commerce & Sciences
  • Learn
  • Online Courses and Certifications
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

Edited By Irshad Anwar | Updated on Oct 07, 2023 02:39 PM IST

Chapter 13: Why Do We Fall Ill| NCERT Solutions for Class 9 Science | Free PDF Download

NCERT Solutions Class 9 Science Chapter 13 Why Do We Fall Ill: These why do we fall ill class 9 solutions are part of the NCERT Solutions for Class 9 Science. All the NCERT solutions for Class 9 Science Chapter 13 are here. This NCERT Solutions contains detailed explanations of Chapter 13 titled Why Do We Fall Ill of Science, taught in Class 9. Chapter 13 Why Do We Fall Ill can be found in the NCERT Textbook if you are a 9th grade student studying science. If you want to score full marks, you must go through class 9 science chapter 13 question answer. Through why do we fall ill class 9 NCERT solutions, you will get to know the approach to solving a question. NCERT Solutions for Class 9 are regularly updated according to the latest CBSE Board Syllabus. We have also curated Why Do We Fall Ill Class 9 Notes to save your time and have a quick revision for the chapter. Go through the questions and answers given in NCERT Solutions Class 9 Science Chapter 13.

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

Chapter 13 Class 9th Science provide knowledge about health and disease. Health is a state of physical, mental, and social well-being. The solutions for NCERT Class 9 Science Chapter 13 Why do we fall ill will give you a better understanding of the chapter. The why do we fall ill class 9 question answers were created by experts and are arranged in a step-by-step manner to make it easy to navigate. As per the previous year's paper analysis, Class 9 Science Chapter 13 carries 3 marks. So, CBSE NCERT Solutions for Class 9 Science Chapter 13 Why do we fall ill will help you get a full score in the exam. NCERT Solutions are also available class- and subject-wise for grades 6–12. Class 9 Science Chapter 13 question answer are given topic-wise below, but before going through the solutions, read some interesting facts about why do we fall ill.

Below are given Class 9 NCERT Science Textbook Solutions for Chapter 13 Why Do We Fall Ill Class 9 PDF:

Download PDF of NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill

Download PDF

Also Read,

NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill?: Solved In-text Questions

Class 9 Science Chapter 13 Question Answer - Topic 13.1: Health and its Failure

Q1. State any two conditions essential for good health.

Answer:

Two conditions essential for good health are:

(i) One should not have any disease.

(ii) One should have a clean and healthy environment around also hygienic food and clean water plays an important role.

Q2. State any two conditions essential for being free of disease.

Answer:

Two conditions essential for being free of disease are:

(i) A proper and healthy diet is necessary.

(ii) Personal hygiene and cleanliness also play an important role.

Q3. Are the answers to the above questions necessarily the same or different? Why?

Answer:

No, the answers to the above questions need not be necessarily the same because disease-free is not the same as being healthy.

Both things are different. A person can have poor health without having any disease.

NCERT Free Solutions Class 9 Chapter 13 Science Question Answer

Topic 13.2 Disease and Its Cause

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 three reasons why a person think that he or she is sick and ought to see a doctor are :

(i) Cough

(ii) fever

(iii) Headache

Even seeing one of these symptoms, I would go to the doctor. A single sign of disease on delaying may cause serious illness.

Q 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.
Why?

Answer:

Jaundice can cause long-term effects on our health. It is a chronic disease and it takes a long time to be cured. It does not spread rapidly, it takes time to develop and time to get cured.

Why do we fall ill Class 9 question answers - Topic 13.3 Infectious Diseases

Q1. Why are we normally advised to take bland and nourishing food when we are sick?

Answer:

During illness our immune system becomes week. For the proper functioning of the immune system, easily digestible food is necessary for a sick person. Also, oil and fat-containing food are not good and could not be digested easily.

Q2. What are the different means by which infectious diseases are spread?

Answer:

The infectious diseases are spread through the following means :

(i) Water: Disease like cholera is spread through contaminated water.

(ii) Air: Common cold, pneumonia is spread through sneezing, coughing through the air.

(iii) Sexual contact: AIDS or syphilis is transmitted through sexual contact.

(iv) Animals: Some diseases like malaria, dengue are spread through mosquitoes.

Q3. What precautions can you take in your school to reduce the incidence of infectious diseases?

Answer:

The precautions we can take in our school to reduce the incidence of infectious diseases can be like :

(i) Using handkerchief while sneezing.

(ii) Providing clean drinking water.

(iii) Preventing overcrowded classes.

(iv) Stay away from a diseased person.

Q4. What is immunisation?

Answer:

Protection of body from communicable diseases by some agents that mimic agents.The introduction of some microbes into the body by vaccination to activate the immune system against a particular disease is known as immunization.

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:

The immunization programs available at the nearest health centre in my locality are :

(i) Polio drops against polio.

(ii) DPT against Tetanus.

(iii)Vaccination against chickenpox.

(iv)Vaccination against hepatitis.

(v) Vaccination against measles.

The major health problems in my area are: Chickenpox, tetanus, hepatitis.

NCERT Solutions Class 9 Science Chapter 13 Exercise Question Answer

Q1. How many times did you fall ill in the last 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 varies from person to person. Some person falls ill frequently and some don't even fall ill. It all depends on our diet, hygiene, and cleanliness also on our immune system.

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:

A doctor/nurse/health-worker is exposed to more sick people than others in the community. She/he avoids getting sick herself/himself by following some tips like:

(i) Using gloves and mask when in contact with a sick person.

(ii) Always drink clean water.

(iii)Ensure proper diet and hygiene all around.

(iv) Using sanitizers.

Q3. Conduct a survey in your neighborhood 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:

The three most common diseases are:

(i) Jaundice

(ii) Tuberculosis

(iii)Typhoid

Steps to avoid these diseases are:

(i) Preventing mosquitoes from breeding.

(ii) Drinking clean and safe water.

(iii)Proper disposal of sewage.

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) The baby is sick if he /she is crying continuously and also can be noticed by behavior changes.

(b) The sickness can be determined by symptoms and noticing the body temperature of the baby.

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:

(c) A person is most likely to fall ill when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox.

The reasons can be like :

(i) After malaria her immune system has become weak so for recovery she should take a healthy diet and in this situation, fasting is not acceptable.

(ii) Her immune system is weak and if she takes care of someone suffering from chickenpox than there is a high probability that she would also gain chickenpox.

Q6. Under which of the following conditions are you most likely to fall sick?

(a) when you are taking examinations.
(b) when you have traveled by bus and train for two days.
(c) when your friend is suffering from measles. Why?

Answer:

(c) When your friend is suffering from measles than you are most likely to fall sick

This is because measles is an infectious disease that spread through nasal or throat discharge.

Science Class 9 Chapter 13: Important Formulas and Diagrams + eBook link

Did you know that, despite having less time, some students perform better on their CBSE exams than others? This is easily explained by the fact that each of them uses different learning and revision strategies and plans. Aside from the Class 9 Chapter 13 Science Question Answer, one way to shorten revision time for NCERT science is to group the most crucial formulas and points together in one location. Once the concepts are understood, it will be possible to glance quickly and be instantly reminded.

Subject experts at Careers360 have compiled a list of all the important formulas for NCERT Science Class 9 in this handy ebook. This ebook will save you time and help you quickly go over every significant formula with examples that you might see in your exams.

For more details - download the ebook given below the introduction section.

Important Topics of NCERT Solutions for Science Chapter 13: Why Do We Fall Ill Class 9?

  • 13.1 - Health and Its Failure
  • 13.1.1 - the Significance of ‘health’
  • 13.1.2 - Personal and Community Issues Both Matter for Health
  • 13.1.3 - Distinctions Between ‘healthy’ and ‘disease-free’
  • 13.2 - Disease and Its Causes
  • 13.2.1 - What Does Disease Look Like?
  • 13.2.2 - Acute and Chronic Diseases
  • 13.2.3 - Chronic Diseases and Poor Health
  • 13.2.4 - Causes of Diseases
  • 13.2.5 - Infectious and Non-infectious Causes
  • 13.3 - Infectious Diseases
  • 13.3.1 - Infectious Agents
  • 13.3.2 - Means of Spread
  • 13.3.3 - Organ-specific and Tissue-specific Manifestations
  • 13.3.4 - Principles of Treatment
  • 13.3.5 - Principles of Prevention

After having a glance on important topics, assess your knowledge by going through Science Class 9 Chapter 13 Question Answer.

Interesting Facts and Definitions of NCERT Class 9 Science Chapter 13 Why Do We Fall Ill?

  • As we know the health of an individual is dependent on his/her physical surroundings and his/her economic status and diseases are classified as acute or chronic, depending on their duration.
  • The disease may be due to infectious or non-infectious causes. Infectious agents belong to different categories of organisms and may be unicellular and microscopic or multicellular. The category to which a disease-causing organism belongs decides the type of treatment.
  • Infections are spread through the air, water, physical contact or vectors. Prevention of disease is more desirable than its successful treatment.
  • Infectious diseases can be stopped by reducing exposure to infectious agents like viruses, bacterias which are known as pathogens. Infectious diseases can also be stopped by using immunization.

Practice questions by going through why do we fall ill question and answers.

Benefits of Why Do We Fall Ill Class 9 Solutions PDF:

  • Solutions for Class 9 Science Chapter 13 have been created in such a way that you can learn and remember them easily.
  • The solutions provided for the Class 9 Science Chapter 13 Question Answer are as per CBSE guidelines.
  • Along with NCERT solutions for chapter 13, you will get other chapter solutions as well.
  • As you go through the Why do we fall ill Class 9 question answers, you will gain in-depth knowledge of all the concepts, which will help you score well in your exams.
  • Chapter 13 Science Class 9 Question Answer have been curated by the experienced faculties at Careers360.
  • The class 9 science chapter 13 NCERT solutions PDF is easy to download and use offline.
  • Class 9 Why do we fall ill NCERT solutions are prepared by subject experts as per the latest CBSE syllabus.

NCERT Solutions for Class 9th Science: Chapter-wise

Chapter No. Chapter Name
Chapter 1 Matter in Our Surroundings
Chapter 2 Is Matter Around Us Pure
Chapter 3 Atoms and Molecules
Chapter 4 Structure of The Atom
Chapter 5 The Fundamental Unit of Life
Chapter 6 Tissues
Chapter 7 Diversity in Living Organisms
Chapter 8 Motion
Chapter 9 Force and Laws of Motion
Chapter 10 Gravitation
Chapter 11 Work and Energy
Chapter 12 Sound
Chapter 13 Why Do We Fall ill?
Chapter 14 Natural Resources
Chapter 15 Improvement in Food Resources

NCERT Solutions for Class 9: Subject-wise

NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 9 Science

Also check the NCERT Books and NCERT Syllabus here:

Frequently Asked Questions (FAQs)

1. What are the benefits of NCERT solution for class 9 science chapter 13 why do we fall ill?

The benefits for class 9 science chapter 13 why do we fall ill are given below: 

  • Solutions for class 9 science chapter 13 has been created in such a way that you can learn and remember easily. 
  • The solutions provided for class 9 science chapter 13 question answer are as per CBSE guidelines. 
  • Along with NCERT solutions for chapter 13, you will get other chapter solutions as well. 
  • As you go through why do we fall ill class 9 question answers, you will get in-depth knowledge of all the concepts which will help you to score well in your exams.
2. How to score well in the examination of class 9?

To score well in the examination, follow the NCERT syllabus and solve the exercise given in the NCERT Book. To practice more problems, students must refer to NCERT Exemplar.

Also Read

Articles

Upcoming School Exams

National Institute of Open Schooling 10th examination

Application Date:21 November,2024 - 20 December,2024

National Institute of Open Schooling 12th Examination

Application Date:21 November,2024 - 20 December,2024

National Means Cum-Merit Scholarship

Admit Card Date:27 November,2024 - 22 December,2024

West Bengal Board 12th Examination

Exam Date:02 December,2024 - 20 December,2024

Gujarat Board Secondary School Certificate Examination

Late Fee Application Date:11 December,2024 - 20 December,2024

View All School Exams
Get answers from students and experts

Popular Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

 Option 2)

0.16\; J
Option 3)

1.00\; J

 Option 4)

0.67\; J
Read More

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

 Option 2)

 6.45×10−3 kg
Option 3)

 9.89×10−3 kg

 Option 4)

12.89×10−3 kg

 
Read More

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

 Option 2)

200 \, \, J - 500 \, \, J
Option 3)

2\times 10^{5}J-3\times 10^{5}J

 Option 4)

20,000 \, \, J - 50,000 \, \, J
Read More

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

 Option 2)

\; K\;
Option 3)

zero\;

 Option 4)

K/4
Read More

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

 Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced
Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

 Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .
Read More

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

 Option 2)

3.125 × 10-2
Option 3)

1.25 × 10-2

 Option 4)

2.5 × 10-2
Read More

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

 Option 2)

increase two fold
Option 3)

remain unchanged

 Option 4)

be a function of the molecular mass of the substance.
Read More

With increase of temperature, which of these changes?

Option 1)

Molality

 Option 2)

Weight fraction of solute
Option 3)

Fraction of solute present in water

 Option 4)

Mole fraction.
Read More

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

 Option 2)

6.023 × 1022
Option 3)

half that in 8 g He

 Option 4)

558.5 × 6.023 × 1023
Read More

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

 Option 2)

more than 3 but less than 6
Option 3)

more than 6 but less than 9

 Option 4)

more than 9
Read More

Colleges After 12th

Popular Course After 12th

Applications for Admissions are open.

JEE Main Important Physics formulas
Apply

As per latest 2024 syllabus. Physics formulas, equations, & laws of class 11 & 12th chapters

JEE Main Important Chemistry formulas
Apply

As per latest 2024 syllabus. Chemistry formulas, equations, & laws of class 11 & 12th chapters

TOEFL ® Registrations 2024
Apply

Accepted by more than 11,000 universities in over 150 countries worldwide

Pearson | PTE
Apply

Register now for PTE & Unlock 20% OFF : Use promo code: 'C360SPL20'. Valid till 31st DEC'24! Trusted by 3,500+ universities globally

JEE Main high scoring chapters and topics
Apply

As per latest 2024 syllabus. Study 40% syllabus and score upto 100% marks in JEE

JEE Main Important Mathematics Formulas
Apply

As per latest 2024 syllabus. Maths formulas, equations, & theorems of class 11 & 12th chapters

View All Application Forms
News and Notifications
Schools in Gurugram, Faridabad to hold classes in hybrid mode due to air pollution
CBSE files police complaint against two Delhi schools for submitting fake land certificates
Several Delhi schools receive bomb threat; fifth incident in nine days
Schools, colleges in Delhi NCR to switch to hybrid mode in view of air pollution
‘Take action’ on 22,298 unrecognised schools in UDISE Plus by March: Education ministry to states
Shiv Nadar School concludes 'Anandam 2024'; celebrating art, creativity in digital age
Jaipur: 10 students hospitalised after suspected gas leak at Mahesh Nagar coaching institute
Back to top