Question

Earth's atmosphere contains

• A. 78% nitrogen, 21% oxygen and 1% other gases
• B. 60% nitrogen, 31% oxygen and 9% other gases
• C. 85% nitrogen, 14% oxygen and 1% other gases
• D. 60% nitrogen, 38% oxygen and 2% other gases

Hint:

Remember the major components of Earth's atmosphere: 78\% nitrogen, 21\% oxygen, and 1\% other gases.

Answer 1

The Correct Option is A

Step 1: Composition of Earth's atmosphere
Earth’s atmosphere is primarily made up of nitrogen and oxygen gases, with small amounts of other gases.
Step 2: Percentage of gases
- Nitrogen constitutes about 78% of the atmosphere.
- Oxygen makes up around 21%.
- The remaining 1% consists of other gases such as argon, carbon dioxide, neon, and trace gases.
Step 3: Importance of this composition
- Nitrogen is inert and provides a stable environment.
- Oxygen is essential for respiration by living organisms.
- Other gases play roles in climate and life support.