What is air primarily composed of?
Air

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Health Sciences, Biology, Life Skills, Geography, Science, Physics, Chemistry
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6th - 9th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solid particles
A mixture of gases
Pure oxygen
Liquid droplets
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which gas is not a major component of Earth's atmosphere?
Helium
Nitrogen
Oxygen
Argon
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does water vapor play in the atmosphere?
It is responsible for cloud formation and precipitation
It causes air pollution
It increases atmospheric pressure
It blocks sunlight
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the atmosphere denser closer to the Earth's surface?
Because of higher temperatures
Due to stronger gravitational pull
Because of more sunlight
Due to less pollution
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the air as you move to higher altitudes?
It becomes warmer
It becomes less dense
It becomes more humid
It becomes denser
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which layer of the atmosphere do airplanes typically fly?
Thermosphere
Stratosphere
Troposphere
Mesosphere
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the outermost layer of Earth's atmosphere called?
Exosphere
Mesosphere
Stratosphere
Troposphere
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