The definition in full
Read it to the end.
Health is a state of well in body, well in mind and well among other people, and not simply free of sickness.
📚 Chapter Learning Kit
Health: The Ultimate Treasure · Class 8 Science · Curiosity
English 5 topics 175 leveled MCQs 85 flashcards 5 games Free
Shared by a Veda teacher · Generated with Veda AI · Oct 2026
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Why "not merely" is there
The clause is load-bearing.
Without it, anybody who passes a search for germs counts as healthy.
A boy who was not ill
No germ anywhere in this story.
He moves to a school in another city, has no friends there, and his parents are busy. To cope he spends more time on his phone.
Half an answer
Ask a class and you get refusals.
Do not smoke. Do not sit all day. Stop staring at that screen. All sound advice, and all of it the same half.
Why the doing half matters
Where the other two parts live.
Mental and social health do not come from avoiding anything. They come from sleeping, relaxing, and spending time with people.
What to eat
Two-sided, like the list itself.
Plenty of fruit, vegetables and whole grains. Less processed, fatty and sugary food and drink.
📖 Smart notes
What you'll study, topic by topic
1
What Health Really Means
Health is being well in all three of body, mind and social life, not just the want of any illness - and a boy with no illness at all shows why the last clause matters.
- Health is wellness across body, mind and social life at once.
- The definition adds "more than an untroubled constitution" to block the loose reading.
- All three parts are required, and none is an optional extra.
~40 min · full explanation, examples & memory tricks in the app
2
Staying Healthy
The list has two halves and most people remember only one - and a clean place to live turns out to protect everybody sharing it, not just you.
- Staying healthy is set out as two lists: things to do and things to avoid.
- The doing half is where mental and social health come from.
- A good diet means plenty of fruit, vegetables and whole grains, and less processed, fatty or sugary food.
~40 min · full explanation, examples & memory tricks in the app
3
Signs, Symptoms and Disease
A symptom is felt and reported; a sign is seen or measured. A doctor wants both, because either alone can mislead - and a disease can sit in the mind as well as the body.
- A symptom is felt by the patient and must be reported.
- A sign can be observed or measured by someone else.
- The test for which is which is who can observe it.
~45 min · full explanation, examples & memory tricks in the app
4
Two Kinds of Disease
Ask one more question of any illness: can the cause reach somebody else? A pathogen behind it makes the illness communicable, with a route to close. No pathogen means a habit to change instead.
- A communicable disease has a pathogen behind it and can pass between people.
- Bacteria, viruses, fungi, worms and protozoa can all be that pathogen.
- Typhoid, dengue, influenza, chickenpox and COVID-19 belong to this group.
~45 min · full explanation, examples & memory tricks in the app
5
Preventing and Treating Disease
Prevention is cheaper and kinder than cure, and works best when a whole community acts. A vaccine trains the immune system before the danger arrives; an antibiotic kills bacteria and nothing else.
- Prevention costs less than cure and protects people who never knew they were at risk.
- The Bhadrak sanitation campaign cut open defecation and childhood diarrhoea.
- Immunity is the natural power of a body to resist disease.
~50 min · full explanation, examples & memory tricks in the app
❓ Leveled MCQ practice
Try the smart MCQs from this kit
175 questions laddered from warm-up to topper-level, each with an explanation. A taste:
How does the World Health Organization define health?
Beginner
A Being well in body, mind and social life
B The absence of any known disease at all
C A body able to fight off any infection
D Freedom from all pain and tiredness
Show answer & explanation
Being well in body, mind and social life
The definition also adds "and not simply the lack of illness", which exists to rule out the easy answer.
Which phrase in the definition rules out calling an illness-free person automatically healthy?
Intermediate
A Mental well-being right throughout
B Complete physical well-being at all times
C Not merely the absence of disease
D A state of social well-being
Show answer & explanation
Not merely the absence of disease
It is there on purpose, because the loose definition passes people who are plainly not well.
A boy has no illness of any kind, but no friends, broken sleep and frequent headaches. Is he healthy by the chapter’s definition?
Intermediate
A Yes, because headaches are quite minor
B No, but only because of the headaches
C Yes, since no disease was found in him
D No, two of the three parts are failing
Show answer & explanation
No, two of the three parts are failing
The definition requires all three kinds of well-being, so failing two of them settles it.
What was the original cause of the lonely boy’s health problems?
Beginner
A A bacterial infection
B A poor diet at home
C A vitamin deficiency
D A social problem
Show answer & explanation
A social problem
He had moved city, had no friends and his parents were busy. No pathogen was involved at any point.
🃏 Flashcards
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Categorization
Fact Or Myth
Sequence Builder
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Speed Quiz
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