Health: The Ultimate Treasure | Class 8 Science Notes
By ConceptScroll Team · Published on 17 July 2026 · 3 min read
Health: The Ultimate Treasure – this guide gives you a concise, exam-ready overview of Health: The Ultimate Treasure from Class 8 Science, written by ConceptScroll editors and reviewed against the latest NCERT textbook.
Health: Is It More Than Not Falling Sick?
This section introduces the concept of health beyond the mere absence of disease. It begins by prompting students to reflect on news clippings about health in India, encouraging them to think about what it means to be truly healthy. Health is defined by the World Health Organization (WHO) as a state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity. This holistic definition emphasizes that a healthy person is not only free from illness but also feels good physically, maintains a positive mental state, and enjoys strong social relationships. The section includes a real-life activity (Activity 3.1) about a Grade 8 student who moved to a new city and experienced loneliness, leading to physical and mental health problems such as headaches, weight loss, and sleep disturbances. This example illustrates how mental and social factors can directly affect physical health. The section also introduces the ancient Indian system of Ayurveda, which teaches that health is a balance of body, mind, and environment. Ayurveda recommends following daily routines (dinacharya) and seasonal routines (ritucharya), eating fresh and wholesome food suited to one's body constitution (prakriti), regular exercise, cleanliness, restful sleep, and maintaining a calm mind through practices like yoga and meditation. These practices support overall well-being and help maintain the balance necessary for good health. The section concludes by highlighting that a healthy person can perform tasks efficiently, cope with challenges, and adjust well socially.
📊 Diagram: Fig. 3.1 illustrates the aspects of health showing the interconnection of physical, mental, and social well-being as essential components of overall health.
🧪 Activity: Activity 3.1: Reading and reflecting on a case of a student facing mental and physical health issues due to loneliness and excessive screen time; understanding the impact of habits and environment on health.
🔗 Connection: Leads to the next section on how to stay healthy by adopting good habits and maintaining hygiene, diet, and lifestyle.
Frequently asked questions
Look at Fig. 3.3a and Fig. 3.3b. Which playground would you like to play in, and why?
Most would prefer to play in the playground shown in Fig. 3.3a because it is clean, well-maintained, and looks beautiful. The playground in Fig. 3.3b is polluted, dirty, unhygienic, and full of flies and mosquitoes, which can cause people living in such areas to fall sick more often. Therefore, a clean and healthy environment is better for playing and overall health.
Which of the following best defines health according to the chapter?
Complete state of physical, mental, and social well-being
Which of the following is NOT a symptom of disease?
High blood pressure
Non-communicable diseases differ from infectious diseases because they are usually caused by:
Lifestyle and environmental factors
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