Health: The Ultimate Treasure — Revision Notes
CBSE · Class 8 · Science
Health: The Ultimate Treasure revision notes for CBSE Class 8 Science: 4 topics in quick points. Part of the CBSE Class 8 Science syllabus.
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Key Topics to Revise
1. Meaning of Health and Healthy Living
- Health means complete physical, mental, and social well-being, not just the absence of disease.
- A healthy person can perform tasks efficiently, cope well in difficult situations, and adjust well with peers and society.
- Good health depends on a balanced diet, regular exercise, proper sleep, cleanliness, less screen time, and a positive attitude.
2. Signs of Being Unwell
- The body gives signals when something is wrong.
- Symptoms are what a person feels, such as pain, tiredness, or dizziness.
- Signs are what can be seen or measured, such as fever, rash, high blood pressure, or swelling.
3. Diseases and Their Types
- A disease is a condition that affects the normal working of the body or mind.
- Diseases are grouped into two major types based on cause and spread: communicable and non-communicable.
- Communicable diseases are caused by pathogens and can spread from one person to another.
4. Communicable Diseases and Their Spread
- All communicable diseases are caused by pathogens.
- Pathogens may be bacteria, viruses, fungi, worms, or protozoa.
- Communicable diseases spread through air, contaminated food and water, direct contact, or insects.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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