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Cards In This Set
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What is the composition of pure dry air
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78% Nitrogen21% Oxygen1% other gases (10 different mixed gases)
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How much water vapor does the atmosphere contain by volume
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0-5%
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What in the atmosphere produces haze and reduced visibility
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Nongaseous particles such as:DustSalt particlesPollen
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What is the layer of the atmosphere adjacent to the Earth's surface called
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Troposphere
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What is the average height of the troposphere?Above the United States?
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Troposphere: 55,000 ft at equator 28,000 ft at the polesOver the US: 36,000 ft
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In which layer of the atmosphere does nearly all weather occur
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Troposphere
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What marks the boundary of the tropopause
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An abrupt change in the rate of temperature decrease (lapse rate)
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What happens to winds as altitude increases
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They generally increase
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What layers of the atmosphere is the tropopause a boundary for
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Below: TroposphereAbove: Stratosphere
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Over the United States what is the average height of the troposphere
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36,000 ft
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Where in the atmosphere will you find the strongest winds
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The jetstream
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Where is the jetstream found
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Just below the tropopause (~30,000 ft)
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What are characteristics of the tropopause
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Temperature is constant with altitude (Isothermal)Normally the coldest area in the lower atmosphereContrails will form and persist
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To what altitude does the stratosphere extend
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66,000 ft
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How is the stratosphere characterized
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Increasing temperature with increasing altitude (Temperature Inversion)
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