PU AHS 2026 Everyday Science Free Quiz 2

11. What is the most common blood type in humans?

A. A+ B. O+ C. B+ D. AB+

12. What is the chemical symbol for silver?

A. Au B. Fe C. Si D. Ag

13. What is the boiling point of water at standard atmospheric pressure?

A. 100°C B. 90°C C. 110°C D. 120°C

14. What is the largest organ in the human body by weight?

A. Skin B. Liver C. Brain D. Heart

15. What is the chemical formula for carbon dioxide?

A. CO B. C₂O C. CO₃ D. CO₂

16. What percentage of the human body is water?

A. 40% B. 50% C. 60% D. 70%

17. What is the most abundant element in the human body?

A. Oxygen B. Carbon C. Hydrogen D. Nitrogen