Question

question 11
carbon dioxide makes up approximately _________ percent of earths atmosphere.
44
4
0.04
94

Explanation:

Carbon dioxide (\(CO_2\)) is a trace gas in Earth's atmosphere. The majority of the atmosphere is nitrogen (\(N_2\), about 78%) and oxygen (\(O_2\), about 21%). Other gases like argon (\(Ar\), about 0.93%) are also present. Carbon dioxide levels have been rising due to human activities (e.g., burning fossil fuels), but as of general knowledge, it still makes up a very small percentage. Among the options, 0.04% is consistent with the known proportion of \(CO_2\) in the atmosphere.

Answer:

0.04