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6.7a Atmosphere

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Question
Answer
Air contains the gaseous state of water called _______ _________.   water vapor  
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_____ is the amount of water vapor in the air.   Humidity  
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Some atmospheric particulates pollute the air and may make it unhealthy to breathe.   True  
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Without greenhouse gases, nighttime temperatures would be extremely _____.   cold  
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Earth's _____________ helps keep the Earth's atmosphere and water close to the Earth's surface, which makes Earth the only planet where life can exist.   gravity  
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Air is a mixture of gaseous elements and _______________.   compounds  
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What element makes up the largest proportion of air?   Nitrogen - 78%  
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The mixture of air includes: _____.   nitrogen, oxygen, argon, and carbon dioxide along with other trace elements. Water vapor is also a part of air's composition.  
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Without the _________________, there would be no clouds or rain.   atmosphere  
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Earth’s atmosphere is dynamic and comprised of interacting and interdependent ______________.   elements  
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Greenhouse gases _____ heat in the atmosphere.   trap  
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Weathering would not happen without the atmosphere. (True or false)   true  
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