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- Multiple ChoicePlease save your changes before editing any questions.
Which gas is present in the atmosphere in the greatest amount?
Oxygen
Nitrogen
Carbon dioxide
- Multiple ChoicePlease save your changes before editing any questions.
Which gas makes up approximately 21% of the atmopshere?
Oxygen
Carbon Dioxide
Argon
- Multiple ChoicePlease save your changes before editing any questions.
Which gas makes up approximately 1% of the atmosphere?
Carbon Dioxide
Methane
Argon
- Multiple ChoicePlease save your changes before editing any questions.
Approximately what percentage of the air is carbon dioxide?
0.10%
0.04%
3.50%
- Multiple ChoicePlease save your changes before editing any questions.
What caused the amount of carbon dioxide to decrease and the amount of oxygen to increase in the early atmosphere?
