Health: The Ultimate Treasure | Class 8 Science Notes
By ConceptScroll Team · Published on 17 July 2026 · 2 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.
How Do We Know That We Are Unwell?
This section explains how the body signals that something is wrong through symptoms and signs. Our body normally functions in a balanced way to keep us healthy. When we feel unwell, it means some internal process is disturbed. Symptoms are subjective experiences felt by the person, such as pain, tiredness, or dizziness. Signs are objective indications that can be observed or measured by others, such as fever, rash, swelling, or high blood pressure. Recognizing symptoms and signs helps doctors diagnose diseases and decide on treatment. The section distinguishes between symptoms (what we feel) and signs (what can be seen or measured). For example, pain is a symptom, while fever is a sign. Understanding these helps in early detection and management of diseases. This foundational knowledge prepares students to learn about diseases, their causes, and prevention.
📊 Diagram: No specific diagram in this section; explanation focuses on conceptual understanding of symptoms and signs.
🔗 Connection: Prepares for the next section on diseases, their causes, types, and modes of transmission.
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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