Students can keep Class 8 Science Extra Questions and Class 8th Curiosity Chapter 3 Health: The Ultimate Treasure Important Extra Question Answer handy for quick reference during exams.
Class 8 Science Chapter 3 Health: The Ultimate Treasure Extra Questions
Class 8 Science Chapter 3 Extra Questions on Health: The Ultimate Treasure
Health: The Ultimate Treasure Class 8 Very Short Question Answer
Question 1.
What is the WHO definition of health?
Answer:
Health is a state of complete physical, mental, and social well-being, not merely the absence of disease.
Question 2.
Name one communicable disease caused by a virus.
Answer:
Flu (Influenza).
Question 3.
What is the purpose of a vaccine?
Answer:
A vaccine trains the immune system to recognize and fight specific pathogens to prevent diseases.
Question 4.
Name one non-communicable disease linked to diet.
Answer:
Diabetes.
Question 5.
What is dinacharya in Ayurveda?
Answer:
Dinacharya is an Ayurvedic daily routine to maintain health through balanced habits like sleep and exercise.
Question 6.
Who discovered the smallpox vaccine?
Answer:
Edward Jenner.
Question 7.
What is a vector in the context of diseases?
Answer:
A vector is an organism, like a mosquito, that transmits pathogens causing diseases.
Question 8.
Name one good habit to maintain hygiene.
Answer:
Washing hands with soap regularly.
Question 9.
What causes antibiotic resistance?
Answer:
Overuse or misuse of antibiotics causes bacteria to survive and develop resistance.
Health: The Ultimate Treasure Class 8 Short Question Answer
Question 1.
Explain how stress can affect your health.
Answer:
Stress weakens the immune system by releasing hormones like cortisol, making you more prone to infections like colds. It can also lead to high blood pressure, insomnia, and contribute to non-communicable diseases like diabetes due to poor sleep and diet habits.
Question 2.
Describe two ways to prevent the spread of the flu.
Answer:
Cover your mouth and nose with a tissue or elbow when coughing or sneezing to prevent droplet spread, and wash your hands frequently with soap to remove germs.
Question 3.
What are the signs and symptoms of diabetes?
Answer:
Signs and symptoms of diabetes include frequent urination, excessive thirst, weight loss, tiredness, and slow healing of wounds.
Question 4.
How can a clean environment improve health?
Answer:
A clean environment reduces pathogens and vectors like mosquitoes, preventing diseases such as dengue and diarrhoea. It also improves air quality, reducing respiratory issues like asthma, as noted in the document.
Question 5.
Explain the role of the immune system in fighting diseases.
Answer:
The immune system protects the body by identifying and destroying pathogens like bacteria and viruses using white blood cells and antibodies. It provides natural immunity and can be enhanced by vaccines for acquired immunity.
Question 6.
Why is it important to use antibiotics wisely?
Answer:
Using antibiotics wisely prevents antibiotic resistance, where bacteria survive treatment and become harder to kill. This ensures antibiotics remain effective for future bacterial infections, as overuse can lead to severe health risks.
Health: The Ultimate Treasure Class 8 Long Question Answer
Question 1.
Discuss the differences between communicable and non-communicable diseases, providing examples from the document.
Answer:
Communicable diseases are caused by pathogens like bacteria or viruses and spread from person to person (e.g., typhoid, chickenpox, COVID-19). Non-communicable diseases (NCDs) are not contagious and result from lifestyle, genetics, or environment (e.g., diabetes, cancer, asthma), with the document highlighting their rise in India due to processed food and inactivity. Communicable diseases require hygiene and vaccines for prevention, while NCDs need lifestyle changes like diet and exercise.
Question 2.
Explain how lifestyle changes can prevent non-communicable diseases like diabetes and obesity.
Answer:
Lifestyle changes can prevent diabetes and obesity by promoting a balanced diet rich in fruits and vegetables, reducing processed and sugary foods. Regular exercise, such as walking or cycling, helps maintain a healthy weight and improves insulin sensitivity, lowering diabetes risk. Limiting screen time, managing stress with yoga, and avoiding tobacco or alcohol also reduce these conditions, as supported by the document’s healthy habit recommendations.
Question 3.
Describe the process of how vaccines work to protect against diseases, including historical examples.
Answer:
Vaccines work by introducing a weakened, dead, or harmless part of a pathogen into the body, training the immune system to recognize and fight it, providing acquired immunity. For example, Edward Jenner’s smallpox vaccine used cowpox to prevent smallpox, leading to its global eradication. India’s traditional variolation also built immunity against smallpox, showing historical efforts that saved millions through vaccination.
Question 4.
Analyze the impact of the Odisha community sanitation campaign and suggest similar initiatives for your area.
Answer:
The Odisha campaign in Bhadrak reduced open defecation by building toilets, improving child health with fewer diarrhoea cases, and proving sanitation’s role in preventing communicable diseases. For my area, a similar initiative could involve a local cleanup drive to remove stagnant water, reducing mosquito-borne diseases like dengue, and a school-led toilet construction project to enhance hygiene, engaging the community for sustained impact.
Question 5.
Explain the discovery of penicillin and its significance in treating bacterial infections, including the issue of antibiotic resistance.
Answer:
Alexander Fleming discovered penicillin in 1928 when he noticed mould killing bacteria on a petri dish, marking the first antibiotic. It revolutionized treatment by effectively killing bacterial infections, saving millions of lives. However, overuse has led to antibiotic resistance, where bacteria survive treatment, making infections harder to cure. Wise use, as prescribed by doctors, is crucial to maintain its effectiveness.
Health: The Ultimate Treasure Class 8 Case Based Questions
Question 1.
A student notices many classmates are absent due to a flu outbreak.
(a) What immediate actions should the school take?
(b) How can the student protect themselves?
Answer:
(a) The school should close temporarily, sanitize classrooms, and encourage sick students to stay home to prevent further spread.
(b) The student can wash hands frequently, avoid close contact with sick classmates, and wear a mask in school.
Question 2.
A family plans to travel to a malaria-prone area.
(a) What precautions should they take before and during the trip?
(b) Why are mosquito nets important in this context?
Answer:
(a) Before the trip, they should use mosquito repellent, get vaccinated if available, and carry nets. During the trip, they should wear long sleeves and sleep under nets.
(b) Mosquito nets protect against malaria by blocking mosquito bites, which transmit the parasite, reducing infection risk.
Question 3.
A friend claims eating fast food daily is harmless.
(a) What health risks can you explain to them?
(b) Suggest two lifestyle changes to reduce these risks.
Answer:
(a) Eating fast food daily can lead to obesity, diabetes, and heart disease due to high sugar and fat content, as warned in the document.
(b) They can switch to a balanced diet with fruits and vegetables and start exercising regularly to maintain a healthy weight.
Health: The Ultimate Treasure Extra Questions for Practice
Question 1.
Define health in one sentence.
Question 2.
Name one vector that spreads diseases.
Question 3.
Name one deficiency disease mentioned in the document.
Question 4.
What is the purpose of pranayama?
Question 5.
Explain two benefits of maintaining personal hygiene.
Question 6.
How does the Odisha sanitation campaign impact child health?
Question 7.
Why is it important to limit screen time?
Question 8.
Explain how communicable diseases spread and suggest three preventive measures.
Question 9.
Discuss the role of traditional medicine like Ayurveda in maintaining health, with examples.
Question 10.
Analyze the significance of Edward Jenner’s smallpox vaccine and its impact on global health.
Question 11.
A student feels tired and thirsty all the time and visits a doctor.
(a) What disease might the doctor suspect?
(b) What lifestyle changes should the student follow?
Question 12.
A community notices an increase in dengue cases after heavy rains.
(a) What environmental factor is likely contributing to this?
(b) Suggest two community actions to reduce the spread.
MCQs
Question 1.
Which of the following best describes a healthy lifestyle according to the document?
(a) Eating fast food daily
(b) Regular exercise and a balanced diet
(c) Spending excessive time on screens
(d) Skipping meals regularly.
Question 2.
What type of disease is caused by a pathogen transmitted by mosquitoes?
(a) Diabetes
(b) Dengue
(c) Asthma
(d) Heart disease
Question 3.
Who is credited with the discovery of the first vaccine?
(a) Alexander Fleming
(b) Edward Jenner
(c) Dr. Kamal Ranadive
(d) Dr. Maharaj Kishan Bhan
Question 4.
What are common symptoms of high blood pressure?
(a) Frequent urination
(b) Headaches
(c) Weight gain
(d) Slow healing
Assertion and Reason Questions
Two statements are given – Assertion (A) and Reason (R). Please read them carefully and choose the correct option.
Question 1.
Assertion (A): Regular exercise can help prevent obesity.
Reason (R): Exercise burns calories and improves metabolism.
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Question 2.
Assertion (A): Antibiotics should not be used for viral infections.
Reason (R): Antibiotics target bacterial cells, not viruses.
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Fill in the blanks
Question 1.
The immune system helps the body fight diseases by producing __________________
Question 2.
__________________ is a non-communicable disease linked to hormonal imbalances and inactivity.
Question 3.
__________________ resistance occurs when bacteria survive antibiotic treatment.
Question 4.
In Ayurveda, __________________ is a seasonal routine to maintain health balance.
True or False
Question 1.
Non-communicable diseases can spread from one person to another.
Question 2.
Vaccines are effective against bacterial infections after they occur.
Question 3.
A clean playground reduces the risk of vector-borne diseases.
Question 4.
Stress has no impact on the immune system.
Match the following
Question 1.
| Column A | Column B |
| 1. Typhoid | (a) Vaccination |
| 2. Dengue | (b) Washing Hands |
| 3. Flu | (c) Removing Standing Water |
| 4. Chickenpox | (d) Wearing Masks |
| 5. COVID-19 | (e) Using Mosquito Nets |