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Almost 99% of Earth's atmosphere is made up of two gases. What are the two gases and the percents of each? A) 21% oxygen and 78% nitrogen B) 21% water vapor and 78% oxygen 09 21% nitrogen and 78% oxygen
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Almost 99% of Earth's atmosphere is made up of two gases. What are the two gases and the percents of each?

A)
21% oxygen and 78% nitrogen
B)
21% water vapor and 78% oxygen
09
21% nitrogen and 78% oxygen
D)
21% carbon dioxide and 78% oxygen

User David Alvarez
by
8.2k points

1 Answer

2 votes
D 21% carbon dioxide and 78% oxygen
User Supun Sameera
by
8.3k points
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