Which of the following is the most common gas in the atmosphere?
A. Oxygen
End of exam
B. Methane
C. Carbon dioxide
D. Nitrogen
my answer s d.
Yes, that is correct.
D. Nitrogen is the most common gas in the atmosphere.
To arrive at this answer, we can look at the composition of the Earth's atmosphere. The Earth's atmosphere consists of different gases in various proportions. The four options given are all important gases in the atmosphere, but their abundance can help us determine the most common gas.
Oxygen (Option A) makes up approximately 21% of the Earth's atmosphere. Methane (Option B) and carbon dioxide (Option C) are both important greenhouse gases, but they exist in much smaller concentrations - methane is less than 0.0002% and carbon dioxide is around 0.04%.
On the other hand, nitrogen (Option D) constitutes about 78% of the Earth's atmosphere, making it the most abundant gas. It is a non-reactive gas that plays a crucial role in maintaining atmospheric pressure and supporting life.
Therefore, the correct answer is D. Nitrogen.