Class 8 / Science / Chapter 3
Curiosity • 2026–27 guide

Health: The Ultimate Treasure

Class 8 Science • Chapter 3

Chapter focus

Connect health with balanced habits, prevention, hygiene, nutrition, rest, activity, and reliable health information.

These are original study notes and practice questions prepared for revision. Use your assigned NCERT edition for the complete lesson, diagrams, activities, and exercise wording.

What you will learn

Key ideas and notes

Worked example

Handwashing with soap before eating interrupts the transfer of many germs from hands to food.

Quick revision

Remember

Health includes physical, mental, and social well-being.

Apply

A balanced diet provides varied nutrients; no single food supplies everything the body needs.

Check

Hygiene, vaccination, safe water, sleep, and physical activity can reduce some health risks.

Original practice questions

Try each question first. Open the answer to check your reasoning.

Give two everyday ways to reduce infection risk.

Answer: Examples: handwashing and safe food/water handling.

Why is variety important in a diet?

Answer: Different foods supply different nutrients.

Does a healthy habit guarantee that a person never gets ill?

Answer: No. Health is affected by many factors; habits reduce risk but do not guarantee outcomes.

Chapter summary

Connect health with balanced habits, prevention, hygiene, nutrition, rest, activity, and reliable health information. The key ideas above give you a short revision path; practise explaining them in your own words and revisit any step you could not justify.

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