CBSE Class 9 Science Why do we Fall ill assignment

Read and download free pdf of CBSE Class 9 Science Why do we Fall ill assignment. Get printable school Assignments for Class 9 Science. Standard 9 students should practise questions and answers given here for Science in Grade 9 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 9 Science prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Why Do We Fall Ill Class 9 Science Assignment Pdf

Class 9 Science students should refer to the following printable assignment in Pdf for Why Do We Fall Ill in standard 9. This test paper with questions and answers for Grade 9 Science will be very useful for exams and help you to score good marks

Class 9 Science Assignment for Why Do We Fall Ill

Why do we Fall ill


Q 1 Write the name of the organism that causes kala-azar.

Q 2 What is a disease?

Q 3 Write one example of both infectious and non-infectious disease?

Q 4 Which type of disease is most dangerous for the health?

Q 5 What happens if the body is suffering from a disease?

Q 6 What are the social aspects that are necessary for individual health?

Q 7 Which organism is responsible for causing malaria?

Q 8 What are vectors?

Q 9 Define health.

Q 10 Name four diseases for which vaccines are available.

Q 11 What do you understand by the term ‗sleeping sickness‘? Give it‘s symptoms.

Q 12 How does community health depend on personal health?

Q 13 How does AIDS virus spread?

Q 14 Why the making of antiviral medicines is harder than antibacterial?

Q 15 What is the difference between acute and chronic diseases?

QUESTIONS

Q 1 Which organism is responsible for causing malaria?

Q 2 What are the social aspects that are necessary for individual health?

Q 3 What happens if the body is suffering from a disease?

Q 4 Which type of disease is more dangerous for health?

Q 5 Write one example of both infectious and non-infectious disease?

Q 6 What is a disease?

Q 7 Write the name of the organism that causes kala-azar.

Q 8 Define health.

Q 9 Name two diseases transmitted through contaminated food and water.

Q 10 Name 2 bacterial diseases in man.

Q 11 Name 2 viral diseases in man. 

Q 12 Which organism causes malignant malaria?

Q 13 What is meant by droplet infection?

Q 14 What is cell?

Q 15 What is the difference between good health and bad health?

Q 16 What is the difference between acute and chronic diseases?

Exam Questions NCERT Class 9 Science Chapter 13 Why do we fall ill

Question. What causes Japanese encephalitis? How it can be prevented?
Ans :(i) Japanese encephalitis is caused by virus which enters into human body through mosquito bite.
(ii) By keeping the surrounding clean and taking proper measures against mosquito bite, it can be prevented.

Question. Write the expanded form of AIDS.
Ans : Acquired Immuno Deficiency Syndrome.

Question. Why is immune system essential for our health?
Ans : The immune system of our body is a type of defence mechanism to fight against pathogenic microbes. It has cells that are specialized to kill infecting microbes and keep our body healthy.

Question. Give difference between Congenital Diseases and Acquired Diseases.
Ans : Congenital :
(i) These occur since from birth.
(ii) Inherited from the parents to the offspring. Acquired : (i) It occurs during the lifetime of the person and not from the birth. (ii) It does not get inherited. It occurs due to pathogens or due to deficiency of nutrients, hormonal imbalance or due to degeneration of the tissues.

Question. Name any two groups of microorganisms from which antibiotics could be extracted.
Ans : Bacteria and fungi.

Question. A child is suffering from fever but the doctor cannot immediately pinpoint the ailment on the basis of this one symptom. Explain, why? Also mention another two such general symptoms.
Ans : Only one symptom cannot tell the name of disease. For example : a headache may just be due to an examination stress or due to meningitis or one of a dozen different diseases. Similarly, fever may be due to different reasons.

Question. Which animal plays the role of vector for malaria?
Ans : Female Anopheles mosquito.

Question. Why is AIDS a fatal disease?
Ans : In AIDS, immune system of the body is highly weakened and body suffers from severe infections which lead to death of the individual. Hence, it is a fatal disease.

Question. Which is the most common type of Plague?
Ans : Bubonic Plague is the most common type of Plague.

Question. What are non-communicable diseases? Give examples.
Ans : Those diseases which cannot be spread from person to person, e.g., Diabetes, Cancer, etc.

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