Health: The Ultimate Treasure — Class 8 MCQs with Answers

Health: The Ultimate Treasure — important questions & MCQs with answers (Class 8 Science)

6 solved questions from this chapter's difficulty levels, each with its answer and explanation. Tap an option to check yourself.

0 of 6 answered

1. Q1 of 6Easy

   Good health means being:

   Aonly free of injuryBonly wealthyCphysically, mentally and socially wellDonly tall
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   Answer: physically, mentally and socially well

   Explanation: Health means complete physical, mental and social well-being, not merely the absence of disease or injury — wealth and height don't define it.

2. Q2 of 6Easy

   A disease that can spread from one person to another is:

   Anon-communicableBa deficiency diseaseCcommunicable (infectious)Dan injury
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   Answer: communicable (infectious)

   Explanation: A disease that passes from an infected person to a healthy one is called communicable, or infectious.

3. Q3 of 6Medium

   Vaccines are best described as:

   Acurative, not preventiveBpreventive, not curativeCfood supplementsDantibiotics
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   Answer: preventive, not curative

   Explanation: Vaccines prevent a disease from taking hold; they do nothing to cure an illness a person already has.

4. Q4 of 6Medium

   Antibiotics do NOT work against:

   Aviruses and protozoaBbacteriaCall germsDnothing at all
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   Answer: viruses and protozoa

   Explanation: Antibiotics target structures found only in bacteria, so they have no effect on viruses or protozoa.

5. Q5 of 6Hard

   The best single description of health is:

   Asimply being tallBhaving lots of moneyCnever sleepingDa state of physical, mental and social well-being
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   Answer: a state of physical, mental and social well-being

   Explanation: Health is best defined as a state of physical, mental and social well-being — not wealth, height or the absence of sleep.

6. Q6 of 6Hard

   A community with clean water, good sanitation and vaccination will have:

   Afewer communicable diseasesBmore infectionsCno need for doctors everDmore obesity
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   Answer: fewer communicable diseases

   Explanation: Clean water, proper sanitation and vaccination all cut the routes by which germs spread, so such a community sees fewer communicable diseases.

Health: The Ultimate Treasure notes: key concepts (Class 8 Science)

This chapter is about protecting health — 'the ultimate treasure'. Good health comes from a balanced diet, exercise, hygiene and clean water, while missing nutrients cause deficiency diseases. Diseases are either communicable (spread by germs through air, water or food) or non-communicable (such as obesity, which do not spread). The immune system defends the body, and vaccines train it in advance to prevent disease. Antibiotics treat bacterial infections only — not viruses — and misusing them causes the dangerous problem of antibiotic resistance.

Health

A state of physical, mental and social well-being, not merely the absence of illness; it is kept up by good habits.

Balanced diet

A diet that supplies all the nutrients in the right amounts, with plenty of fruits and vegetables; it prevents deficiency diseases.

Deficiency disease

An illness caused by the lack of a particular nutrient in the diet, prevented by eating a varied, balanced diet.

Exercise and hygiene

Regular exercise keeps the body fit, and hygiene (like washing hands) and clean water stop the spread of germs.

Communicable diseases

Infectious diseases caused by germs that spread from person to person through the air, contaminated water and food, or worms.

Non-communicable diseases

Diseases that do not spread between people, such as obesity, which is linked to poor diet and lack of exercise.

Immune system and immunity

The body's defence system fights germs; immunity is the ability to resist a disease, including acquired immunity built after exposure.

Vaccines

Preparations that train the immune system to recognise and attack a germ, giving acquired immunity; they are preventive, not curative.

History of vaccines

Edward Jenner made the first vaccine against smallpox using cowpox; India had an earlier inoculation tradition and is now a major vaccine producer.

Antibiotics

Medicines that kill disease-causing bacteria by targeting parts of bacterial cells; they do not work against viruses or protozoa. Penicillin, discovered by Fleming in 1928, was the first.

Antibiotic resistance

When bacteria survive and multiply despite an antibiotic, caused by misuse such as taking antibiotics unnecessarily or not finishing the course — it makes infections harder to treat.

Preventing disease

Clean water, good sanitation, hygiene, a balanced diet and vaccination together keep communicable and deficiency diseases away.