Imp Questions For All Chapters – General Science Class 8
Short Questions
1. What is health?
- Health means physical, mental, and social well-being.
2. What is disease?
- Disease is when the body does not work properly.
3. What are acute diseases?
- Diseases that last for a short time, like flu.
4. What are chronic diseases?
- Long-term diseases that last for months or years.
5. Give one example of a hereditary disease.
- Down’s syndrome is a hereditary disease.
6. What are infectious diseases?
- Diseases that spread from one person to another.
7. What are non-infectious diseases?
- Diseases that do not spread from person to person.
8. How does tuberculosis (TB) spread?
- TB spreads through air by coughing or sneezing.
9. Which bacteria cause cholera?
- Vibrio cholerae bacteria cause cholera.
10. How is malaria spread?
- Malaria spreads through mosquito bites.
11. Which virus causes AIDS?
- HIV (Human Immunodeficiency Virus) causes AIDS.
12. Which disease causes yellow skin and urine?
- Hepatitis (Jaundice) causes yellow skin and urine.
13. How can we prevent dengue?
- By keeping surroundings clean and avoiding mosquito bites.
14. What is the main cause of diabetes?
- Low insulin production in the body.
15. Which disease is caused by tobacco use?
- Cancer can be caused by tobacco use.
16. How is rabies transmitted?
- Rabies spreads through animal bites like dogs.
17. What is the full form of AIDS?
- Acquired Immunodeficiency Syndrome.
18. Why should we drink boiled water?
- To prevent diseases like cholera and typhoid.
19. Which test is used to diagnose AIDS?
- ELISA test is used to diagnose AIDS.
20. What is the role of vaccination?
- Vaccines protect against infectious diseases.
Long Questions
1. What is the difference between infectious and non-infectious diseases?
- Infectious diseases spread through germs, while non-infectious diseases are caused by lifestyle or genetics. Infectious diseases include flu and malaria, while diabetes and cancer are non-infectious.
2. How does malaria spread and how can we prevent it?
- Malaria spreads through the bite of an infected Anopheles mosquito. It can be prevented by keeping surroundings clean, using mosquito nets, and avoiding stagnant water.
3. What are the main causes of heart disease and how can we prevent it?
- Heart disease is caused by smoking, obesity, stress, and lack of exercise. It can be prevented by eating healthy food, exercising regularly, and avoiding junk food.
4. What are the symptoms and prevention of tuberculosis (TB)?
- Symptoms of TB include chronic cough, weight loss, and fever. It can be prevented by taking the BCG vaccine, maintaining hygiene, and avoiding contact with infected people.
5. How does AIDS spread, and how can we stay safe?
- AIDS spreads through unsafe sexual contact, infected needles, or blood transfusions. It can be prevented by using sterilized needles, practicing safe sex, and getting tested regularly.
6. Why is drinking clean and boiled water important for health?
- Drinking unclean water can cause diseases like cholera, typhoid, and dysentery. Boiling or filtering water kills germs and makes it safe for drinking.
7. What are the causes and symptoms of diabetes?
- Diabetes is caused by low insulin levels, obesity, or heredity. Symptoms include frequent urination, tiredness, weight loss, and increased thirst.
8. What are the harmful effects of smoking and tobacco?
- Smoking and tobacco cause lung cancer, heart disease, and breathing problems. Avoiding smoking helps in living a longer and healthier life.
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