Multiple choice general knowledge

What is the most common Element on Earth ?

  1. Oxygen

  2. Hydrogen

  3. Carbon di oxide

  4. Nitrogen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen is the most common element in the universe by far, constituting approximately 75% of all normal matter by mass. While oxygen is the most abundant element in Earths crust, nitrogen dominates Earths atmosphere, and carbon dioxide is a compound not an element - hydrogen reigns supreme in cosmic abundance. Stars, including our Sun, are primarily powered by hydrogen fusion.

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