issb general knowledge MCQ #817

Which gas is most abundant in Earth's atmosphere?

issb general knowledge MCQ #817

  1. Question 1

    Q1. Which gas is most abundant in Earth's atmosphere?

    • A) Oxygen
    • B) Nitrogen
    • C) Carbon dioxide
    • D) Hydrogen

    Answer: Nitrogen

    Explanation: Nitrogen makes up about 78 percent of the atmosphere. This fact often appears in ISSB academic and general knowledge sections.