APES - Unit 3: Chapter 17 Atmosphere and Air Pollution

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What is the troposphere?

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The troposphere is the lowest layer of Earth's atmosphere, where most weather events occur and where air movement drives weather patterns.

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

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What gas makes up 78% of Earth's atmosphere?

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Nitrogen (N2) is the gas that constitutes approximately 78% of Earth's atmosphere.

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What is convection circulation?

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Convection circulation is the process where warm moist air rises and cooler air sinks, creating vertical air currents.

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

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What percentage of Earth's atmosphere is composed of oxygen gas (O2)?

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Approximately 21% of Earth's atmosphere is composed of oxygen gas.

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What are nitrogen oxides?

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Nitrogen oxides (NOx) are pollutants released from burning fossil fuels that contribute to the formation of tropospheric ozone and acid rain.

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What is the role of the stratosphere?

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The stratosphere is the second layer of the atmosphere, located above the troposphere, and contains the ozone layer, which absorbs and scatters ultraviolet solar radiation.

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What is photochemical smog?

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Photochemical smog is a type of air pollution that results from the reaction of sunlight with pollutants such as nitrogen oxides and volatile organic compounds, leading to the formation of ozone at ground level.

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NGSS.HS-ESS3-6

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What is the Coriolis effect?

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The Coriolis effect is the deflection of moving objects, such as air currents, caused by the rotation of the Earth, influencing weather patterns and ocean currents.

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NGSS.MS-ESS2-6

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What is acid rain?

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Acid rain is precipitation that contains high levels of sulfuric and nitric acids, primarily caused by emissions from burning fossil fuels, leading to environmental harm.

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NGSS.MS-LS2-4

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What is the mesosphere?

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The mesosphere is the third layer of Earth's atmosphere, located above the stratosphere, where temperatures decrease with altitude and meteors burn up upon entering this layer.