select the correct answer.\nwhich gas forms 21% of earths atmosphere?\na. argon\nb. carbon dioxide\nc…
select the correct answer.\nwhich gas forms 21% of earths atmosphere?\na. argon\nb. carbon dioxide\nc. nitrogen\nd. oxygen
Answer
Brief Explanations:
- Argon makes up about 0.93% of Earth's atmosphere.
- Carbon dioxide makes up about 0.04% of Earth's atmosphere.
- Nitrogen makes up about 78% of Earth's atmosphere.
- Oxygen makes up about 21% of Earth's atmosphere.
Answer:
D. oxygen