University

Science

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1. Multiple Choice
30 seconds
1 pt
Which gas is present in the atmosphere in the greatest amount?
Oxygen
Nitrogen
Carbon dioxide
2. Multiple Choice
1.5 minutes
1 pt
Which gas makes up approximately 21% of the atmopshere?
Oxygen
Carbon Dioxide
Argon
3. Multiple Choice
1.5 minutes
1 pt
Which gas makes up approximately 1% of the atmosphere?
Carbon Dioxide
Methane
Argon
4. Multiple Choice
30 seconds
1 pt
Approximately what percentage of the air is carbon dioxide?
0.10%
0.04%
3.50%
5. Multiple Choice
30 seconds
1 pt
What caused the amount of carbon dioxide to decrease and the amount of oxygen to increase in the early atmosphere?
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