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Class 8 Science Chapter 3 – Health: The Ultimate Treasure | NCERT Curiosity Worksheet

Practise Class 8 Science Chapter 3 – Health: The Ultimate Treasure with this easy NCERT Curiosity worksheet. Includes important questions and revision exercises to strengthen understanding of health and related scientific concepts and prepare effectively for class tests and exams.

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Class 8 Science Worksheet

Chapter 3 – Health: The Ultimate Treasure

Fresh Practice Worksheet

Name: __________________________
Class/Section: __________________
Roll No.: _______________________
Date: ___________________________
Instructions:
  1. Read every question carefully.
  2. Answer in simple and clear sentences.
  3. Attempt all questions.
  4. For MCQs, choose the correct option.
  5. Use the answer key at the end for self-checking.

Section A – Multiple Choice Questions

1. Which of the following is NOT an aspect of health?
(a) Physical well-being
(b) Mental well-being
(c) Social well-being
(d) Only physical appearance
2. Which of the following is a communicable disease?
(a) Diabetes
(b) Asthma
(c) Chickenpox
(d) High blood pressure
3. Which organism can act as a vector for disease transmission?
(a) Mosquito
(b) Mango tree
(c) Grass
(d) Earthworm
4. Which of the following is a symptom?
(a) High blood pressure measured by an instrument
(b) Rash seen on the skin
(c) Pain felt by a person
(d) Body temperature measured by a thermometer
5. Which type of medicine is mainly used against bacterial infections?
(a) Antibiotics
(b) Vaccines
(c) Vitamins
(d) Antiseptics
6. Which habit can help maintain good health?
(a) Skipping meals
(b) Sleeping very late every day
(c) Regular physical activity
(d) Eating junk food at every meal
7. Which disease can be spread by mosquitoes?
(a) Malaria
(b) Scurvy
(c) Diabetes
(d) Goitre
8. What is the main purpose of vaccination?
(a) To increase screen time
(b) To train the immune system to recognise certain harmful germs
(c) To replace healthy food
(d) To cure every existing disease
9. Which of the following can contribute to antibiotic resistance?
(a) Taking antibiotics only when prescribed
(b) Using antibiotics unnecessarily
(c) Washing hands regularly
(d) Eating fresh food
10. Which of these is a non-communicable disease?
(a) Typhoid
(b) Measles
(c) Diabetes
(d) Chickenpox

Section B – Fill in the Blanks

1. Health includes physical, mental and __________ well-being.
2. Disease-causing organisms are called __________.
3. A __________ is something that a person feels, such as pain.
4. A __________ is something that can be observed or measured.
5. The natural ability of the body to fight diseases is called __________.
6. Mosquitoes can act as disease-carrying __________.
7. Antibiotics are mainly effective against __________ infections.
8. Excessive use of antibiotics can lead to antibiotic __________.
9. Clean drinking __________ is important for preventing many diseases.
10. Getting enough __________ helps the body and mind rest and recover.

Section C – True or False

1. Good health means only the absence of disease.
2. Mental well-being is an important part of health.
3. All diseases are communicable.
4. Diabetes is a non-communicable disease.
5. Mosquitoes can transmit some diseases.
6. Antibiotics are effective against viral infections such as common cold.
7. Washing hands can help prevent the spread of infectious diseases.
8. Vaccines are mainly used to prevent certain diseases.
9. Healthy surroundings can support good health.
10. Taking antibiotics without need can contribute to antibiotic resistance.

Section D – Match the Following

Column AColumn B
1. MalariaA. Bacteria
2. TyphoidB. Mosquito
3. DiabetesC. Vaccine
4. ImmunityD. Non-communicable disease
5. PenicillinE. Antibiotic

Section E – Very Short Answer Questions

1. What is meant by health?
2. What is a pathogen?
3. What is immunity?
4. Give one example of a communicable disease.
5. Give one example of a non-communicable disease.
6. What is a vector?
7. Name one disease spread by contaminated water.
8. Name one disease spread by mosquitoes.

Section F – Short Answer Questions

1. Why is mental well-being important for good health?
2. Write any four healthy habits that students should follow.
3. Differentiate between a symptom and a sign.
4. What is the difference between communicable and non-communicable diseases?
5. How can dirty surroundings increase the risk of disease?
6. Why should personal items such as towels and handkerchiefs not be shared with an infected person?
7. Why is regular exercise important for health?
8. Why should antibiotics not be taken without medical advice?

Section G – Think and Answer

1. A student sleeps only five hours every night because of excessive mobile phone use. How might this affect the student’s health?
2. Two students eat the same food, but one exercises regularly while the other spends most of the day sitting. How might their health be different?
3. Why can stagnant water near houses increase the risk of mosquito-borne diseases?
4. A child has fever and feels tired. Are these signs, symptoms, or both? Explain.
5. Why is keeping drinking water clean important for community health?

Section H – Application-Based Questions

1. Your school is planning a health-awareness week. Suggest five activities that could encourage students to develop healthy habits.
2. A neighbourhood has many open garbage dumps and stagnant water. Suggest four actions that could improve the situation.
3. Your friend says, “I have a cold, so I should take an antibiotic.” How would you explain why this may not be correct?
4. A family is travelling to an area where dengue is common. What precautions should they take?
5. A student is feeling lonely after changing schools and spends most of the time alone using a mobile phone. Suggest some healthy ways to support the student.

Section I – Case-Based Questions

Case Study:

A school noticed that many students were falling sick during the rainy season. Some students had fever, while others complained of body ache and weakness. The school found stagnant water near the playground and several mosquito-breeding places. The school decided to clean the area and spread awareness about mosquito control.
1. Which type of organism can spread diseases such as dengue and malaria?
2. Why can stagnant water be dangerous?
3. Write two ways students can protect themselves from mosquito bites.
4. Why is community participation important in controlling mosquito-borne diseases?

Section J – Case Study: Antibiotic Resistance

Case Study:

Ravi had a mild illness and took antibiotics left over from an earlier prescription without consulting a doctor. He stopped taking the medicine as soon as he felt better. Later, he developed a bacterial infection that did not respond well to the same antibiotic.
1. What mistake did Ravi make?
2. Why can stopping antibiotics early be harmful?
3. What is antibiotic resistance?
4. Write two rules for responsible use of antibiotics.

Section K – Compare and Differentiate

BasisCommunicable DiseasesNon-communicable Diseases
Cause
Spread
Example

Section L – HOTS Questions

1. If a community has excellent hospitals but poor sanitation, can diseases still spread easily? Explain.
2. Why can a healthy lifestyle reduce the risk of some non-communicable diseases but not guarantee that a person will never become ill?
3. Why is vaccination useful not only for an individual but also for the wider community?
4. A city has clean drinking water but heavy air pollution. Can its people still face health problems? Give reasons.
5. Why is health considered more than simply being free from disease?

Section M – Challenge Zone

1. Create a simple “Healthy Student” daily routine including food, exercise, sleep, study, screen time and relaxation.
2. Imagine that mosquitoes suddenly increase around your school. Prepare a five-point action plan to reduce the risk of mosquito-borne diseases.
3. Write a short slogan or message encouraging people not to misuse antibiotics.
4. Design a simple health-awareness poster using the following heading: “Healthy Habits, Healthy Life”.

Answer Key

Section A – MCQs

  1. (d) Only physical appearance
  2. (c) Chickenpox
  3. (a) Mosquito
  4. (c) Pain felt by a person
  5. (a) Antibiotics
  6. (c) Regular physical activity
  7. (a) Malaria
  8. (b) To train the immune system to recognise certain harmful germs
  9. (b) Using antibiotics unnecessarily
  10. (c) Diabetes

Section B – Fill in the Blanks

  1. social
  2. pathogens
  3. symptom
  4. sign
  5. immunity
  6. vectors
  7. bacterial
  8. resistance
  9. water
  10. sleep

Section C – True or False

  1. False
  2. True
  3. False
  4. True
  5. True
  6. False
  7. True
  8. True
  9. True
  10. True

Section D – Match the Following

Column AAnswer
1. MalariaB. Mosquito
2. TyphoidA. Bacteria
3. DiabetesD. Non-communicable disease
4. ImmunityC. Vaccine
5. PenicillinE. Antibiotic

Section E – Very Short Answers

  1. Health is complete physical, mental and social well-being.
  2. A pathogen is a disease-causing organism.
  3. Immunity is the body’s ability to fight diseases.
  4. Example: Chickenpox.
  5. Example: Diabetes.
  6. A vector is an organism that can spread a pathogen, such as a mosquito.
  7. Example: Cholera.
  8. Example: Malaria.

Section F – Short Answers

  1. Mental well-being helps us manage emotions, stress and daily difficulties.
  2. Eat balanced food, exercise, sleep properly and maintain hygiene.
  3. A symptom is felt by a person, while a sign can be observed or measured.
  4. Communicable diseases can spread between people; non-communicable diseases do not spread from person to person.
  5. Dirty surroundings can support the spread of pathogens and disease-carrying insects.
  6. Personal items may carry pathogens and spread infection.
  7. Exercise keeps the body active and supports physical and mental health.
  8. Unnecessary antibiotics can cause antibiotic resistance and may not work against viral infections.

Section G – Think and Answer

  1. Too little sleep and excessive screen use can cause tiredness, poor concentration and affect well-being.
  2. The student who exercises regularly may have better physical fitness and health.
  3. Stagnant water provides breeding places for mosquitoes.
  4. Fever is a sign that can be measured; tiredness is a symptom felt by the person.
  5. Clean water prevents many infections spread through contaminated water.

Section H – Application-Based Questions

  1. Health talks, exercise activities, healthy-food awareness, hygiene demonstrations and stress-management activities.
  2. Remove stagnant water, dispose of garbage properly, clean drains and improve sanitation.
  3. Common cold is usually caused by viruses, while antibiotics work against bacteria.
  4. Use repellents or mosquito nets, wear long sleeves and avoid mosquito-breeding areas.
  5. Encourage friendship, family support, healthy activities, reduced screen time and counselling when needed.

Section I – Case-Based Questions

  1. Mosquitoes.
  2. It provides a breeding place for mosquitoes.
  3. Use mosquito repellents and mosquito nets.
  4. Everyone must help remove breeding places and maintain cleanliness.

Section J – Antibiotic Resistance

  1. Ravi used leftover antibiotics without medical advice and stopped early.
  2. It may allow some bacteria to survive and contribute to resistance.
  3. It is the ability of bacteria to survive an antibiotic that previously killed them.
  4. Use antibiotics only when prescribed and follow the prescribed dose and duration.

Section K – Compare

Communicable: Usually caused by pathogens and can spread from one person to another.

Non-communicable: Do not spread from person to person and may be linked to lifestyle, diet, environment or other factors.

Section L – HOTS

  1. Yes. Poor sanitation can allow pathogens to spread even when hospitals are available.
  2. A healthy lifestyle reduces some risks but cannot remove every possible cause of disease.
  3. Vaccination protects individuals and can also reduce the spread of certain infections.
  4. Yes. Air pollution can cause breathing problems and other health effects.
  5. Health also includes mental and social well-being, not just the absence of disease.

Section M – Challenge Zone

Answers will vary. Students should give sensible answers based on healthy habits, disease prevention and the concepts studied in the chapter.

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