Students rely on Class 8 Science Extra Questions and Class 8 Curiosity Chapter 3 Extra Question Answer Health The Ultimate Treasure to help self-study at home.
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 a symptom that helps identify if a person is unwell? (Competency Based Que.)
Answer:
Fever or cough is a symptom that indicates the body is affected by an illness and is fighting against infection.
Question 2.
Which disease shows symptoms like high fever, rashes, and red eyes?
Answer:
Measles shows symptoms such as high fever, skin rashes, cough, and red, watery eyes.
Question 3.
Name any two visible symptoms of malaria.
Answer:
Malaria commonly causes high fever and severe shivering, especially in repeated cycles.
Question 4.
How do flies cause diseases through uncovered food?
Answer:
Flies sit on garbage or dirty places, pick up germs, and transfer them to uncovered food, which causes disease when consumed.
Question 5.
What is meant by a communicable disease?
Answer:
A communicable disease is an illness that can spread from one person to another through air, water, food, or direct contact.
Question 6.
Name one disease that spreads through air when an infected person coughs or sneezes.
Answer:
Tuberculosis spreads through the air when an infected person coughs or sneezes, releasing germs.
Question 7.
How does a mosquito help in the spread of diseases like dengue?
Answer:
When a mosquito bites an infected person, it picks up germs and spreads them to other people through bites.
Question 8.
Identify the disease given in the image below. (Competency Based Que.)
Answer:
The disease shown in the image is tuberculosis.
Question 9.
Why should we not let water collect in containers around the house?
Answer:
Stagnant water provides a breeding ground for mosquitoes, which can spread diseases like malaria and dengue.
Question 10.
Give one example of a non-communicable disease.
Answer:
High blood pressure is a non-communicable disease as it does not spread from person to person.
Question 11.
What is the role of vaccination in preventing diseases?
Answer:
Vaccination helps the body to build immunity by preparing it to fight against specific germs before they can cause disease.
Question 12.
What is the use of antibiotics in treating diseases?
Answer:
Antibiotics are medicines that kill or stop the growth of disease causing germs inside the body.
Health The Ultimate Treasure Class 8 Short Question Answer
Question 1.
How can a community’s poor waste disposal system affect the health of individuals living in that area?
Answer:
Poor waste disposal leads to unhygienic surroundings, allowing flies and mosquitoes to breed, which can spread diseases like typhoid, malaria and dengue, increasing the risk of illness for all individuals in the area.
Question 2.
Explain how social harmony and public cleanliness together impact individual health.
Answer:
Social harmony reduces mental stress and public cleanliness prevents disease spread. Together, they create a healthier environment that supports both physical and mental well-being.
Question 3.
A person in a polluted city develops breathing issues. Explain how air quality affects health using information from the Chapter. (Competency Based Que.)
Answer:
Polluted air contains harmful particles and gases. Breathing such air regularly can cause respiratory problems like asthma or chronic coughing. A poor Air Quality Index (AQI) indicates higher health risks.
Question 4.
A person is coughing continuously and feels weak. What steps should be taken to prevent the possible spread of infection to others?
Answer:
The person should cover their mouth while coughing, wear a mask, avoid close contact, wash hands frequently, and rest at home. These measures prevent the spread of airborne germs that may cause diseases like tuberculosis.
Question 5.
A family keeps water stored in open buckets for daily use. Their child falls ill with high fever and joint pain. Which disease is likely, and what could be the reason?
Answer:
The child may be suffering from dengue. The open water allowed mosquitoes to breed, which then transmitted the disease through bites.
Question 6.
If a person eats contaminated food and suffers from fever and abdominal pain, which disease might they have and how could it have been prevented?
Answer:
They might have typhoid, which spreads through contaminated food and water. It could be prevented by maintaining food hygiene, drinking clean water, and avoiding uncovered street food.
Question 7.
Why are non-communicable diseases on the rise in modern society? Mention two lifestyle-related causes with examples.
Answer:
Modern diets with high sugar and fat, and lack of physical activity, lead to diseases like diabetes and obesity. These conditions are non-communicable but widespread due to unhealthy lifestyles.
Question 8.
Why is vaccination considered preventive and not curative? Support your answer using a scientific explanation.
Answer:
Vaccines prepare the immune system to recognise and fight specific germs in the future. They prevent infection before it occurs but cannot cure an infection once it has already developed.
Question 9.
How can using antibiotics in farm animals lead to antibiotic resistance in humans? (Competency Based Que.)
Answer:
Antibiotics given to animals can lead to the growth of resistant bacteria. These bacteria can enter the human body through meat or milk, making future infections harder to treat with the same antibiotics.
Question 10.
Why is it dangerous to stop taking antibiotics midway through treatment, even if one feels better?
Answer:
Stopping antibiotics early may allow surviving bacteria to develop resistance. These resistant bacteria multiply and cause harder-to-treat infections in the future.
Health The Ultimate Treasure Class 8 Long Question Answer
Question 1.
A neighbourhood experiences repeated outbreaks of typhoid and diarrhoea. As a health advisor, suggest and explain five corrective actions that the residents and local authorities should take to prevent these diseases.
Answer:
To prevent outbreaks of typhoid and diarrhoea, the following corrective actions should be taken
- Ensure clean drinking water : Contaminated water is a major source of these diseases. Water should be boiled or properly filtered before use.
- Proper disposal of garbage and sewage : Open drains and garbage attract flies and contaminate water sources. Safe disposal systems must be maintained.
- Avoid eating uncovered food : Flies sitting on uncovered food can carry disease-causing germs.
- Personal hygiene : Washing hands with soap before eating and after using the toilet helps prevent infection.
- Public awareness : Health education about disease transmission and prevention must be spread in the community.
Question 2.
Two children in a locality fall ill, one with malaria and the other with tuberculosis. Compare and contrast how these diseases spread, their symptoms, and the preventive measures required for each.
Answer:
Malaria and tuberculosis are two different infectious diseases. They differ in their modes of transmission, signs of illness, and the steps needed for prevention. The table below shows these key differences
| Aspects | Malaria | Tuberculosis (TB) |
| Spread | Spread by the bite of an infected mosquito (vector-borne disease). | Spread through the air when an infected person coughs or sneezes (airborne disease). |
| Symptoms | High fever with chills, sweating, headache, nausea, vomiting. | Persistent cough (often with blood), chest pain, fever, weight loss, night sweats. |
| Prevention | Use mosquito nets, insect repellents, eliminate standing water, wear protective clothing. | Cover mouth while coughing, wear masks, and getting vaccinated. |
Question 3.
During the rainy season, many people in a town develop high fever, body ache, and rashes. Investigations confirm it’s dengue. Explain how environmental negligence might have contributed to this outbreak.
Answer:
During the rainy season, stagnant rainwater collects in open containers, tyres, and other discarded items. This creates ideal breeding grounds for mosquitoes. When such mosquitoes, bite people, they can spread diseases like dengue. Lack of awareness and failure to remove or cover stagnant water sources are forms of environmental negligence that directly contribute to such outbreaks.
Question 4.
Explain how vaccination protects the body from diseases. Why is it important to vaccinate children at an early age?
Answer:
Vaccination introduces a weakened or inactive form of a disease-causing germ into the body. This stimulates the immune system to recognise and fight the actual germ if it enters the body in the future. Children are more vulnerable to infections, so early vaccination helps build their immunity against serious diseases and protects them from falling sick.
Question 5.
A patient suffering from a bacterial infection is prescribed antibiotics. He stops the medicine midway when he feels better. Later, he falls ill again and the antibiotics no longer work. Explain why this happened, how antibiotic resistance develops, and what precautions should be taken when using antibiotics.
Answer:
Stopping antibiotics early allows some bacteria to survive. These remaining bacteria may become resistant to the medicine, meaning the same antibiotic would not be effective later. This is called antibiotic resistance. To prevent this antibiotics should be taken only when prescribed. The full course should be completed even if symptoms improve. One should never use leftover or someone else’s medicine.
Health The Ultimate Treasure Class 8 Case Based Questions
Question 1.
Sita and Gita are two close friends who both became mothers around the same time. Sita follows a traditional and cautious approach when it comes to her baby’s health. She does not allow doctors to give any medicines through injections to her child because she believes it might be harmful or unnecessary. On the other hand, Gita is educated and trusts modern medical advice. She allows doctors to give her baby the required vaccinations and injections.
After some time, Sita’s baby started suffering from several illnesses and health problems, while Gita’s baby remained healthy and strong.
(i) Why did Sita’s baby become sick while Gita’s baby stayed healthy?
(ii) What risks do babies face if they do not receive proper vaccinations? (Competency Based Que.)
Answer:
(i) Gita’s baby received important vaccinations through injections, which protect against many dangerous diseases. Sita’s baby did not get these vaccinations, making the baby more likely to fall ill.
(ii) Babies without vaccinations are more vulnerable to dangerous diseases. These diseases can cause severe complications or even be life-threatening.
Skill Based Questions
Question 1.
Take three clean plates and label them A, B, and C.
Plate A: Wipe with a sanitised cloth.
Plate B: Wipe with an unwashed hand.
Plate C: Wipe with a hand after coughing into it.
Leave the plates in a warm place for 24 hours and observe the microbial growth.
Which plate is expected to show the highest microbial growth, and what does this experiment demonstrate about disease transmission? (Analytical skill)
Question 2.
Visit a nearby clinic or health center and ask a doctor or nurse about common diseases reported in the area. Based on your observations, how can the diseases be classified into communicable and non-communicable? Also, suggest two preventive measures for (Thinking Skill)
Question 3.
Apply a UV-sensitive gel (representing germs) on your hands and wash them using three methods.
Method 1: Rinse with water only
Method 2: Wash with soap for 20 seconds
Method 3: Use hand sanitiser
Check your hands under UV light. (Analytical skin)
Which handwashing method is most effective in removing germs and why is proper hand hygiene important in preventing diseases?
Question 4.
Based on the diagram below, explain why preventing stagnantion of water is important for health. (Observation Skill)
Health The Ultimate Treasure Extra Questions for Practice
Very Short Answer Type Questions
Question 1.
Name one disease spread by mosquito.
Question 2.
Define communicable disease.
Question 3.
What is a vaccine?
Short Answer Type Questions
Question 1.
How can community health be improved through awareness and preventive measures?
Question 2.
Write two differences between communicable and non-communicable diseases.
Question 3.
How does vaccination protect the body from diseases?
Long Answer Type Question
Question 1.
Design an activity that spreads awareness about the importance of vaccines in preventing diseases like polio and measles.