Daily air intake?
💡 Explanation: Approx breathing
Most abundant in Earth crust?
💡 Explanation: Oxygen highest
Most abundant element in universe?
💡 Explanation: Hydrogen dominates
Average blood volume in adults?
💡 Explanation: Approx 5 liters
The Sun is a?
💡 Explanation: Sun is a star
Second most abundant element in Sun?
💡 Explanation: Helium ~25%
Who discovered radioactivity?
💡 Explanation: Discovered in 1896
What is the density of water?
💡 Explanation: Standard density
Average lifespan of red blood cells?
💡 Explanation: RBC lifespan is 120 days
What happens to pressure when gas volume decreases?
💡 Explanation: Boyle’s law
Who discovered the photoelectric effect?
💡 Explanation: Einstein won Nobel Prize
What percentage of the human body is water by weight?
💡 Explanation: Average water content is ~60%
What is the chemical formula of ozone?
💡 Explanation: Ozone contains three oxygen atoms
Which line divides the Earth into Northern and Southern Hemispheres?
💡 Explanation: Equator splits Earth into two halves
Which component of the human body primarily stores energy?
💡 Explanation: Fats act as the main energy reserve