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EVSC 3300 Exam 1 Review (updated)questions well answered
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EVSC 3300 Exam 1 Review (updated)questions well answered
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EVSC 3300 Exam 1 Reviewatmospheric composition - correct answer ✔✔• Nitrogen 78%
• Oxygen 21%
• Argon .93%
• Carbon Dioxide 0.035%
source of nitrogen - correct answer ✔✔denitrification- decaying plant and animal matter and fixation
sinks- soil bacteria, ocean phytoplankton, lightning
source of oxygen - correct answer ✔✔photosynthesis, ocean phytoplankton and sinks- decay of organic
matter, oxidation, combustion, respiration
carbon dioxide - correct answer ✔✔greenhouse gas (410ppm), lower in summer because of plants
source of carbon dioxide - correct answer ✔✔biomass decay, deforestation, respiration, burning plants,
volcanic activity, fuel combustion
methane - correct answer ✔✔greenhouse gas (CH4)
source of methane - correct answer ✔✔anaerobic environments- wetlands, termites, rice paddies,
biomass burning. sinks- interaction with OH in the atmosphere
nitrous oxide - correct answer ✔✔greenhouse gas (330 ppb)
source of nitrous oxide - correct answer ✔✔bacteria in soils and oceans, combustion from cars and
biomass, fertilizer. sinks- stratospheric photo-chemistry
tropospheric ozone - correct answer ✔✔ground level ozone; is considered bad because it is closer to the
earth and made up of particulate matter. where weather happens
, stratospheric ozone - correct answer ✔✔good ozone; produces oxygen molecules to interact with UV
radiation and prevent it from reaching the surface. O3 is naturally occurring
depletes ozone - correct answer ✔✔polar temperatures, chlorofluorocarbons, sunlight
forms ozone - correct answer ✔✔smog- nitrogen oxide from motor vehicle traffic, volatile organic
compounds (fast food), and sunlight (photo chemical reaction)
chlorofluorocarbons - correct answer ✔✔greenhouse gases that deplete the ozone in the stratosphere
because they break down into constituent atoms such as chlorine
aerosols - correct answer ✔✔solid particles or liquid droplets that remain suspended in the atmosphere
with low terminal velocity, (particulate matter)
examples of aerosols - correct answer ✔✔desert dust, sea salt, forest fire, volcanoes, pollen
fossil fuel and biomass burning
types of aerosols - correct answer ✔✔natural(85%) and anthropogenic (15%)
aerosol effects - correct answer ✔✔serve as cloud condensation nuclei and reduce visibility and air
quality, important in forming acid rain
atmospheric pressure - correct answer ✔✔the pressure exerted by atoms and molecules in the
atmosphere resulting from gravitational attraction (collisions of these particles)
pressure changes - correct answer ✔✔pressure varies with weather systems and elevation. in warm air it
takes longer for air pressure to decrease. higher heights= lower pressure
troposphere - correct answer ✔✔the lowest layer of the atmosphere (0-17km); where weather happens,
high pressure
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