NCERT Class 8 Science MCQ | Chapter 3: Health: The Ultimate Treasure
1. According to the World Health Organization (WHO), health is best described as:
(A) Being free from all diseases
(B) Complete physical, mental, and social well-being
(C) Being physically strong
(D) Having a healthy diet only
Answer: (B) Complete physical, mental, and social well-being
2. Which of the following is NOT one of the three main aspects of health shown in the chapter?
(A) Physical
(B) Mental
(C) Social
(D) Financial
Answer: (D) Financial
3. Which of the following can contribute to a person’s overall health?
(A) Healthy lifestyle and clean surroundings
(B) Excessive screen time
(C) Lack of sleep
(D) Regular consumption of junk food
Answer: (A) Healthy lifestyle and clean surroundings
4. Which of the following is a healthy habit mentioned in the chapter?
(A) Skipping breakfast
(B) Eating junk food every day
(C) Exercising regularly
(D) Sleeping very late
Answer: (C) Exercising regularly
5. Which type of food should be included in a balanced diet?
(A) Only sugary foods
(B) Fruits, vegetables, and whole grains
(C) Only processed foods
(D) Only fatty foods
Answer: (B) Fruits, vegetables, and whole grains
6. Why is limiting screen time considered important for maintaining health?
(A) It helps us avoid physical activity
(B) It allows more time for rest, physical activity, and nature
(C) It increases dependence on digital devices
(D) It prevents social interaction
Answer: (B) It allows more time for rest, physical activity, and nature
7. What can polluted air from vehicles and factories cause?
(A) Better concentration
(B) Coughing or asthma
(C) Improved eyesight
(D) Stronger immunity
Answer: (B) Coughing or asthma
8. What does the Air Quality Index (AQI) help us understand?
(A) How nutritious food is
(B) How clean or polluted the air is
(C) How much water we should drink
(D) How fast a person can run
Answer: (B) How clean or polluted the air is
9. Which statement correctly distinguishes a symptom from a sign?
(A) A symptom can be felt, while a sign can be seen or measured
(B) A symptom can only be measured, while a sign can only be felt
(C) Both are always visible
(D) Both are always caused by pathogens
Answer: (A) A symptom can be felt, while a sign can be seen or measured
10. Which of the following is an example of a symptom?
(A) High body temperature
(B) Rash
(C) Pain
(D) Swelling
Answer: (C) Pain
11. What are disease-causing organisms called?
(A) Nutrients
(B) Pathogens
(C) Antibodies
(D) Vectors
Answer: (B) Pathogens
12. Which of the following is a non-communicable disease?
(A) Dengue
(B) Chickenpox
(C) Diabetes
(D) Typhoid
Answer: (C) Diabetes
13. Which statement about communicable diseases is correct?
(A) They cannot spread between people
(B) They are caused by pathogens and can spread from one person to another
(C) They are always caused by poor nutrition
(D) They are never caused by microorganisms
Answer: (B) They are caused by pathogens and can spread from one person to another
14. Which of the following is an example of a disease spread through contaminated food or water?
(A) Cholera
(B) Malaria
(C) Dengue
(D) Chickenpox
Answer: (A) Cholera
15. Which pathogen causes tuberculosis (TB), according to the table in the chapter?
(A) Virus
(B) Bacterium
(C) Protozoan
(D) Worm
Answer: (B) Bacterium
16. Which of the following diseases is transmitted by mosquitoes?
(A) Typhoid
(B) Cholera
(C) Malaria
(D) Hepatitis A
Answer: (C) Malaria
17. What are mosquitoes and houseflies called when they spread pathogens?
(A) Parasites
(B) Vectors
(C) Vaccines
(D) Antibodies
Answer: (B) Vectors
18. Which precaution can help prevent the spread of dengue?
(A) Leaving stagnant water around the house
(B) Using mosquito nets and repellents
(C) Sharing personal items
(D) Avoiding handwashing
Answer: (B) Using mosquito nets and repellents
19. Which of the following is a deficiency disease?
(A) Diabetes
(B) Anaemia
(C) Dengue
(D) Chickenpox
Answer: (B) Anaemia
20. What is immunity?
(A) The ability of the body to fight diseases
(B) The ability to digest food
(C) The ability to grow taller
(D) The ability to avoid exercise
Answer: (A) The ability of the body to fight diseases
21. How do vaccines help protect the body?
(A) They directly cure every disease
(B) They train the immune system to recognise and fight harmful germs
(C) They replace the need for hygiene
(D) They destroy all microorganisms in the body
Answer: (B) They train the immune system to recognise and fight harmful germs
22. Who discovered the first vaccine against smallpox?
(A) Alexander Fleming
(B) Edward Jenner
(C) Kamal Ranadive
(D) Maharaj Kishan Bhan
Answer: (B) Edward Jenner
23. Why should antibiotics not be taken for viral infections such as the common cold or flu?
(A) Antibiotics work only against bacterial infections
(B) Antibiotics always increase body temperature
(C) Antibiotics work only against worms
(D) Antibiotics prevent the immune system from working
Answer: (A) Antibiotics work only against bacterial infections
24. What is antibiotic resistance?
(A) The ability of antibiotics to kill every type of pathogen
(B) A condition in which bacteria survive and multiply despite treatment with an antibiotic
(C) The body’s inability to produce vaccines
(D) The ability of viruses to produce antibiotics
Answer: (B) A condition in which bacteria survive and multiply despite treatment with an antibiotic
25. Which practice can help reduce antibiotic resistance?
(A) Taking antibiotics whenever we have a cold
(B) Stopping antibiotics as soon as symptoms improve
(C) Using antibiotics only when prescribed, in the correct dose and for the right duration
(D) Sharing prescribed antibiotics with others
Answer: (C) Using antibiotics only when prescribed, in the correct dose and for the right duration
NCERT Class 8 Science MCQ | Chapter 3: Health: The Ultimate Treasure
Assertion–Reason Questions
Directions:
Choose the correct option:
(A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
(B) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
(C) Assertion is true, but Reason is false.
(D) Assertion is false, but Reason is true.
1. Assertion: Health is more than just the absence of disease.
Reason: Health includes physical, mental, and social well-being.
Answer: (A)
2. Assertion: Communicable diseases can spread from one person to another.
Reason: Communicable diseases are caused by pathogens such as bacteria, viruses, fungi, worms, or protozoa.
Answer: (A)
3. Assertion: Mosquitoes can act as vectors of diseases.
Reason: Some pathogens can be transmitted from one person to another through insects such as mosquitoes.
Answer: (A)
4. Assertion: Vaccines can help prevent certain infectious diseases.
Reason: Vaccines train the immune system to recognise and fight harmful germs.
Answer: (A)
5. Assertion: Antibiotics should not be used to treat viral infections such as the common cold or flu.
Reason: Antibiotics work against bacterial infections but do not work against viruses.
Answer: (A)
