Question

Which gas is most abundant in the Earth's atmosphere?

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

Hint:

Nitrogen plays a crucial role in the nitrogen cycle and supports life on Earth.

Answer 1

The Correct Option is C

Step 1: Recall atmospheric composition.
The Earth's atmosphere is made up of several gases in varying proportions.
Step 2: Identify the dominant gas.
Nitrogen makes up about 78% of the Earth's atmosphere.
Step 3: Compare with others.
Oxygen makes up about 21%.
Carbon dioxide and hydrogen are present in very small amounts.
Step 4: Conclusion.
Therefore, nitrogen is the most abundant gas in the Earth's atmosphere.