Health: The Ultimate Treasure
Class 8
Science Curiosity Chapter 3 Answers
1. Group the diseases shown in the images as communicable or
non-communicable.
🦠
Disease Classification
👉 See
Answer:
🔴
Communicable diseases (spread from one person to another):
1.
🤧 Cold
and flu
2.
🦠
Typhoid
3.
🔴
Chickenpox
🟢
Non-communicable diseases (do not spread, caused by lifestyle, environment or
body conditions):
1.
🍬
Diabetes
2.
🌬️ Asthma
✔️ Conclusion:
👉 3 are communicable
& 2 are non-communicable
❓ 2.
Diseases can be broadly grouped into communicable and non-communicable
diseases. From the options given below, identify the non-communicable diseases.
(i) Typhoid (ii) Asthma (iii) Diabetes (iv) Measles
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
👉 See
Answer:
✔️ Correct
answer: (b) (ii) and (iii)
💡
Explanation:
- 🦠
Typhoid → Communicable (spreads through
contaminated food/water)
- 🌬️
Asthma → Non-communicable (allergy/respiratory
issue)
- 🍬
Diabetes → Non-communicable
(lifestyle/metabolic)
- 🤧
Measles → Communicable (spreads through
air/droplets)
❓ 3.
There is a flu outbreak in your school...
(i) What immediate actions should the school
take to prevent further spread?
👉 See
Answer:
🏫 Immediate
actions by the school:
• 🛌 Tell sick students to
stay at home and take rest
• 😷 Cover mouth and nose
while coughing/sneezing
• 🧼 Provide sanitizers
& ensure handwashing
• 🌬️ Keep classrooms clean
and ventilated
• 📢 Inform parents and take
cooperation
(ii) If your classmate... how can you respond?
👉 See
Answer:
🤝 My
response:
• ❌ I will not laugh or make rude
comments
• 💬 “You don’t look well,
maybe tell the teacher and rest”
• 🧻 Offer tissue / remind
politely
• ❤️ Show care without hurting
feelings
(iii) How can you protect yourself and others?
👉 See
Answer:
🛡️ Protection
steps:
• 🧼 Wash hands regularly
• 😷 Wear mask
• 🙅 Avoid touching face
• ↔️ Maintain distance politely
• 🥗 Eat healthy + drink
warm water
🦟 4.
Travel to Malaria-Prone Area
(i) What precautions should you take...
👉 See
Answer:
🧳 Before
trip:
• 👨⚕️ Doctor
advice
• 🦟 Mosquito nets &
repellents
• 👕 Full-sleeved clothes
🚗 During
trip:
• 🛏️ Use mosquito nets
• 🧴 Apply repellents
• 🚫 Avoid water collection
• 👕 Wear full sleeves
🏠 After
trip:
• 🌡️ Watch for fever/chills
• 🏥 Visit doctor if
symptoms
(ii) Explain importance of mosquito nets
👉 See
Answer:
💬
“Mosquitoes spread malaria when they bite. Nets and repellents act like a 🛡️ shield — they protect
us just like armor protects a soldier.”
(iii) What happens if advisories ignored?
👉 See
Answer:
⚠️ Risks:
• 🤒 Malaria infection
• 🏥 Hospitalization
• 🏠 Spread to others
🚭 5.
Smoking Awareness
(i) What would you say to your uncle?
👉 See
Answer:
💬
“Uncle, I care for you ❤️.
Smoking may look cool, but it damages lungs 🫁, causes cancer and shortens life. Saying
NO shows real strength 💪.”
(ii) If friend offers cigarette
👉 See
Answer:
🚫
Response:
• “No, thanks”
• “I don’t want to spoil my health”
• 🚶 Walk away if needed
✔️ Real
friends don’t force bad habits
(iii) How can schools help prevent such habits?
👉 See
Answer:
🏫
Schools can:
• 📢 Awareness campaigns
• 👨⚕️ Invite
doctors/counsellors
• 🎥 Show films &
posters
• 🏃 Encourage sports, yoga,
debates
Class 8 Science Curiosity 3 Question 6 and 7
6. Saniya claims to her friend Vinita that “Antibiotics can
cure any infection, so we don’t need to worry about diseases.” What question(s)
can Vinita ask her to help Saniya understand that her statement is incorrect?
See Answer• Do antibiotics work against viruses like flu, cold or measles?
• If antibiotics cured every disease, then why do we still need vaccines?
• Why do doctors say not to take antibiotics for coughs and colds?
• Have you heard about antibiotic resistance — when germs stop responding to medicines?
These questions will make Saniya think and understand that antibiotics only
work against bacterial infections, not viral or other diseases.
7. The following table contains information about the number
of dengue cases reported in a hospital over a period of one year:
Make a bar graph of the number of cases on the Y-axis and
the month on the X-axis. Critically analyse your findings and answer the
following:
(i) In which three months were the dengue cases highest?
See Answer July, August, September (65 cases each).
(ii) In which month(s) were the cases lowest?
See Answer January (10 cases).
(iii) What natural or environmental factors during the peak
months might contribute to the increase in dengue cases?
See Answer Natural/environmental factors during peak months:
• These months fall in the monsoon season.
• Rainwater often collects in puddles, tanks or containers.
• Stagnant water becomes a breeding ground for mosquitoes (Aedes aegypti),
which spread dengue.
(iv) Suggest a few preventive steps that the community or
government can take before the peak season to reduce the spread of dengue.
See Answer Preventive steps before peak season:
• Clean and cover water tanks; don’t let water stagnate.
• Regular fogging and spraying of insecticides by authorities.
• Encourage people to use mosquito nets and repellents.
• Awareness campaigns in schools, colonies and markets.
• Community cleanliness drives to remove tyres, bottles or open containers
where water can collect.
Class 8 Curiosity Chapter 3 Question 8 and 9
❓ 8.
Imagine you are in charge of a school health campaign. What key messages would
you use to reduce communicable and non-communicable diseases?
👉 See
Answer:
🦠 For
Communicable Diseases:
• 🧼 Wash
hands with soap regularly
• 😷 Always cover your mouth
and nose while coughing or sneezing
• 💧 Drink only clean and
safe water
• 🧹 Keep classrooms and
surroundings clean to avoid mosquito breeding
• 💉 Get vaccinated on time
• 🛌 Stay home and rest if
you are sick to prevent spreading infections
🍏 For
Non-Communicable Diseases:
• 🥗 Eat a
balanced diet with fruits, vegetables and less junk food
• 🏃 Exercise, play outdoor
games or do yoga every day
• 📱 Limit screen time and
get enough sleep 😴
• 🚭 Avoid harmful habits
like smoking, alcohol or drugs
• 🧘 Manage stress with
relaxation, hobbies and talking to family or friends
🎯 Slogan
idea for the campaign:
💚
“Healthy Habits Today, Strong Future Tomorrow!”
❓ 9. It
is recommended that we should not take an antibiotic for a viral infection like
a cold, a cough or flu. Can you provide the possible reason for this
recommendation?
👉 See
Answer:
• 💊
Antibiotics work only against bacteria (kill or stop bacterial growth)
• 🦠 Cold, cough and flu are
caused by viruses → antibiotics do NOT work
• ⚠️ Wrong use of antibiotics leads
to antibiotic resistance
• ❌ Later medicines may not work
when actually needed
✔️ Conclusion:
👉 Take antibiotics only
when prescribed by a doctor 👨⚕️
❓ 10.
Which disease(s) among the following may spread if drinking water gets
contaminated by the excreta from an infected person?
Hepatitis A, Tuberculosis, Poliomyelitis, Cholera,
Chickenpox.
👉 See
Answer:
• 💛
Hepatitis A → spreads through contaminated food and
water
• 🦠 Poliomyelitis (Polio) →
spreads through contaminated food/water
• 💧 Cholera →
spreads through contaminated water and food
❓ 11.
When our body encounters a pathogen for the first time, the immune response is
generally low but on exposure to the same pathogen again, the immune response
by the body is much more compared to the first exposure. Why is it so?
👉 See
Answer:
🦠 First
time infection:
• Body is not familiar with pathogen
• ⏳ Takes time to make antibodies
• Response is slow and weak
🧠 Second
time infection:
• Body has memory cells
• ⚡ Quickly recognizes pathogen
• 💪 Produces more
antibodies faster
💉 Important:
👉 This is the reason vaccines
work — they prepare the body in advance
🎯 Final
Line
💚 Strong
Immunity = Strong Life
👉 Stay
healthy, stay safe 🚀
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