Question

level 5 q4 what percent of earths atmosphere is carbon dioxide? a. 21% b. 1% c. 0.04% d. 0.00001%

Explanation:

To determine the percentage of Earth's atmosphere that is carbon dioxide, we recall the composition of Earth's atmosphere. Nitrogen makes up about 78%, oxygen about 21%, argon about 0.93%, and carbon dioxide is a trace gas with a concentration of approximately 0.04%. Option A (21%) is oxygen, option B (1%) is incorrect for CO₂, option D (0.00001%) is too low. So the correct percentage for CO₂ is 0.04%.

Answer:

C. 0.04%