Which gas makes up the majority of Earth's atmosphere?
A
Argon
B
Oxygen
C
Carbon dioxide
D
Nitrogen
Correct Answer: Option D — Nitrogen
Explanation:
Nitrogen makes up approximately 78 percent of Earth's atmosphere, making it the most abundant gas, while oxygen constitutes about 21 percent...
Nitrogen makes up approximately 78 percent of Earth's atmosphere, making it the most abundant gas, while oxygen constitutes about 21 percent, with trace amounts of other gases making up the rest.