Question

1.
Which are the two main gases which account for about 99 percent of the atmosphere?
OPTIONS
Mark for Review
w
AO
Ozone and argon
Во
Hydrogen and helium
CO
Oxygen and nitrogen
DO
Oxygen and carbon dioxide​

Answer 1

Answer:

We live at the bottom of an invisible ocean called the atmosphere, a layer of gases surrounding our planet. Nitrogen and oxygen account for 99 percent of the gases in dry air, with argon, carbon dioxide, helium, neon, and other gases making up minute portions. Water vapor and dust are also part of Earth's atmosphere.

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