AOSS Review Sheet - AOSS/CHEM 105 Exam #1 Review Chapter 1...

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AOSS/CHEM 105 Exam #1 Review Chapter 1 Composition of the Atmosphere What are the three most abundant gases in the atmosphere? 1. Nitrogen 2. Oxygen 3. Water Vapor What is the most important variable gas in the atmosphere? -Water Vapor Define greenhouse gas and give some examples . -. Components that contribute to greenhouse effect. Water Vapor, carbon dioxide, methane, nitrous oxide/ What are aerosols and what are some important sources? -Aerosols are tiny solid or liquid suspended particles of various compositions. Sources are wind pick up dust, small water droplets from ocean, smoke from forest fires. What are pollutants and what are some important examples? -Pollutants are human induced impurities. - Automobile engines—NO2, hydrocarbons SO2—Burning fossil fuels (sulfur containing coal and oil)—Acid rain Vertical Structure of the Atmosphere How do air pressure and air density change with height in the atmosphere and why? - Air pressure is the amount of force exerted over an area of surface. As altitude increase, the pressure at levels decrease because there are fewer air molecules above us and therefore the force above us, pressure, is less. At first air pressure decrease significantly but as the altitude continues to increase air pressure decreases but on a smaller scale than before. - Air Density is the measure of the mass of air molecules per volume of the atmosphere. Because, air density is the measure of the mass of air molecules and there are less as altitude increases, Air density also decreases with an increase in altitude. What are the four main layers of the atmosphere and how does temperature change with height within these regions? -The four main layers of the atmosphere are the Troposphere, the Stratosphere, the Mesosphere, and the Thermosphere. As you go from: - From the Troposphere to the Stratosphere temperature decreases - From the Stratosphere to the Mesosphere the temperature increases - From the Mesosphere to the Thermosphere temperature decreases - From the Thermosphere outward the temperature increases
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What atmospheric gas is responsible for the temperature inversion in the stratosphere? Explain. -
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This note was uploaded on 04/01/2008 for the course AOSS 105 taught by Professor Keeler during the Spring '08 term at University of Michigan.

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AOSS Review Sheet - AOSS/CHEM 105 Exam #1 Review Chapter 1...

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