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EHST 2110 Final Exam Questions and Answers 100% Correct

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EHST 2110 Final Exam Questions and Answers 100% CorrectEHST 2110 Final Exam Questions and Answers 100% CorrectEHST 2110 Final Exam Questions and Answers 100% CorrectEHST 2110 Final Exam Questions and Answers 100% Correct Composistion of the Atmosphere - ANSWER - 78% nitrogen 21% oxygen 0.9% argo...

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  • August 13, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • EHST 2110
  • EHST 2110
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NursingTutor1
EHST 2110 Final Exam Questions and
Answers 100% Correct
Composistion of the Atmosphere - ANSWER - 78% nitrogen
21% oxygen
0.9% argon
0.03% carbon dioxide


Troposphere - ANSWER - sea level to 8 miles above earth; temperature falls with increasing
altitude


stratosphere - ANSWER - 8-30 miles above Earth; temperature slowly rise with increasing
altitude


site of ozone layer - ANSWER - stratosphere


mesosphere - ANSWER - uppermost layer where air becomes progressively more diffuse;
temperature falls with increasing altitude


thermosphere - ANSWER - region above the mesosphere and below the exosphere;
temperature typically 200C


CFCs - ANSWER - chlorofluorocarbons; chemicals used as refrigerants and aerosol propellants


halons - ANSWER - bromofluorocarbons; fire suppressant; widespread use in 1960s-1970s


1978 - ANSWER - nationwide ban on ozone-depleting gases
natural air pollution - ANSWER - volcanic eruptions, forest fires, dust storms, methane gas
released from organic matter decay

, industrialized nations largest sources are: - ANSWER - transportation, electric power plants that
burn coal or oil, industry: steel mills, metal smelters, oil refineries, paper and pulp mills


1985 - ANSWER - hole in ozone represented 40% decline in ozone concentration; continues to
increase


Rising levels of atmospheric CO2 - ANSWER - as CO2 increases, more infrared radiation will be
absorbed, and average global temperatures will increase


Greenhouse effect - ANSWER - atmospheric CO2 plays a vital role in moderation the Earth's
temperature; atmosphere allows light to enter but prevents the escape of heat


other greenhouse gases - ANSWER - methane, nitrous oxide, halocarbons, water vapor


methane (CH4) - ANSWER - far more potent greenhouse gas; rice cultivation, microbial activity
in cattle termite intestines, landfills, gas and coal production emissions, oil rig flares, tropical
deforestation


halocarbons - ANSWER - CFCs, PFCs, SF6, HFCs; each molecule has a direct warming effect
12,000-20,000 times greater than a CO2 molecule


nitrous oxide (N2O) - ANSWER - laughing gas; atmospheric concentrations are up 17% since
1750; natural by-product of the metabolism of certain soil microbes


climate - ANSWER - Prevailing weather conditions of an area in general or over a long period of
time


climate change - ANSWER - change in the usual weather found in a place; change in rainfall,
temperature, or overall Earth's weather patterns


evidence for climate change - ANSWER - ice core analyses; melting sea ice and mountain
glaciers; ocean waters eating up and acidifying; increasing height of the tropopause; shifting
range of biological species and temporal advancement of spring events

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