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Questions and Answers
What are the main constituents of Earth's atmosphere in volume?
What are the main constituents of Earth's atmosphere in volume?
- Carbon dioxide (78%) and Oxygen (21%
- Nitrogen (78%) and Oxygen (21% (correct)
- Nitrogen (21%) and Oxygen (78%
- Oxygen (78%) and Helium (21%
What happens to the air density and atmospheric pressure as we go higher from Earth's surface?
What happens to the air density and atmospheric pressure as we go higher from Earth's surface?
- They remain the same
- They decrease (correct)
- They fluctuate
- They increase
Which gas becomes less and less at higher altitude, causing human beings to experience suffocation?
Which gas becomes less and less at higher altitude, causing human beings to experience suffocation?
- Oxygen (correct)
- Carbon dioxide
- Argon
- Nitrogen
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