CBSE Class 8 Science Health The Ultimate Treasure (Class 8 NCERT New) Quiz 8

1. Which feature distinguishes chronic diseases from acute illnesses?

A They persist for more than three months B They only affect young children C They always spread person to person D They are cured by rest in two days

2. Which lifestyle change is suggested to reduce obesity risk?

A Balanced diet and regular exercise B High sugar intake and long screen time C Skipping meals and minimal hydration D Only taking supplements without activity

3. Which set lists common diabetes signs and symptoms?

A Blurred vision, itchy scalp, stiff joints B Fast hair growth, cold tolerance, thick skin C Frequent urination, excessive thirst, slow healing D Low appetite, strong nails, loud heartbeat

4. What does immunity refer to in the human body?

A Natural ability to fight diseases B Ability to digest complex foods C Capacity to grow muscles quickly D Skill to control body temperature

5. How do vaccines help the immune system protect against disease?

A They train recognition and attack of pathogens B They increase blood pressure and pulse rate C They stop hormones from acting in tissues D They replace all white blood cells instantly

6. Which statement correctly describes acquired immunity from vaccination?

A Defense present from birth without any exposure B Immunity that only lasts for one single day C Protection developed after exposure to a pathogen D Resistance created by drinking extra water

7. Which example shows how an inactivated component vaccine works?

A Tetanus shot with inactivated bacterial toxin B Antibiotics that kill active bacteria directly C Vitamin tablets improving general metabolism D Painkillers reducing swelling after sprains

8. What key observation led Edward Jenner toward the first vaccine?

A Children with measles always developed mumps B People with flu recovered faster in winter C Farmers exposed to pollen were never sick D Milkmaids with cowpox did not get smallpox

9. Which sequence matches Jenner’s scientific method steps?

A Observation, hypothesis, experimentation, results B Experimentation, results, observation, hypothesis C Results, observation, experimentation, hypothesis D Hypothesis, results, observation, experimentation

10. Why did mass vaccination campaigns in the 1960s–1970s matter for smallpox?

A They made cowpox infections more common B They slightly increased annual case counts C They led to global eradication by 1979 D They shifted smallpox only to cold regions