Week 7: Structure and Composition of the Atmosphere
Question 139869 • 2026-27 AL-Earth and Space Science
Read the question, and then use the drop-down menus to complete the paragraph.
Answer
The most abundant gas in Earth’s atmosphere is , followed by , which is needed to burn wood and fuel. The third-most abundant gas is . The amount of in the atmosphere is very small, making up just 0.0:
nitrogen
The most abundant gas in Earth’s atmosphere is , followed by , which is needed to burn wood and fuel. The third-most abundant gas is . The amount of in the atmosphere is very small, making up just 0.0:
oxygen
The most abundant gas in Earth’s atmosphere is , followed by , which is needed to burn wood and fuel. The third-most abundant gas is . The amount of in the atmosphere is very small, making up just 0.0:
argon
The most abundant gas in Earth’s atmosphere is , followed by , which is needed to burn wood and fuel. The third-most abundant gas is . The amount of in the atmosphere is very small, making up just 0.0:
carbon dioxide
The most abundant gas in Earth’s atmosphere is , followed by , which is needed to burn wood and fuel. The third-most abundant gas is . The amount of in the atmosphere is very small, making up just 0.0: