3) dissolved oxygen4) hydrogen sulfide5) coliform bacteria17. An environmental science studentobserved a sound meter recording of 100decibels when a train entered the station?What conclusion can be drawn from thisobservation?12. Which factor is a major cause of globalwarming?1) increased number of green plants2) decrease in atmospheric CO.3) increased burning of fuelsd) increase in photosynthesis1) This sound volume meets healthstandards.2)This sound level would not bedamaging to the ears.3)This volume of sound constitutes noisepollution.4)This sound level is not considered anexample of noise pollution.13. The effluent coming from a typicalsewage treatment plant is1) free of all pollutants2) low in pathogens3) high in sludge4) high is fecal wastesBase your answers to questions 18 to 20 on the following chemical reactionCO:+ H;0 - H,CO, + HCO,+ H*co +2H18. This chemical reaction can produce 1) a small number of hydrogen ions 2) a large numberof hydroxyl ions 3) ocean acidification 4) anoxia19. A possible source of carbon dioxide is 1) photosynthesis 2) algae 3) chemosynthesis 4)fossil fuels20. Adding Ca To this reaction would result in 1) a decrease in H* 2) an increase if H' 3) anincrease in pH 4) a decrease in alkalinity|22. The gas being measured in thoatmosphere is 1) carbon monoxide2) carbon dioxideAtmospheric CO, at Mauna Loa Observatory3) sulfur dioxide4) nitrogen dioxide 5) methane380- 1958-1974 Sorppe Inst. Oceanography1974-ac0R NDAAESAI.23.The graph shows that 1) CO: levels in theatmosphere have decreased over the years2) Global warming is occurring3) The sea level is rising4) Almuspheric CO, has increused in theatmosphere between 1960 and 200836034024. Which explanation best explains the riseand fall each year in CO, from 1960 to2008?1) seasonal variations due to respiration2) scasonal variations in photosynthesis3) more pollution occurs during thesummer than during the winter4) global warmingNORA320196019701980189020002010YEARBuse your answers to questions 21 to 25 on the abovegraph21. What is the approximate level of CO: producedin 1980?1) 380 ppm 2) 360ppm 3) 340ppm 4) 320ppm25. What part of the scientific method wouldthe above graph illustrate?I) hypothesis 2) materials 3) procedure4) results 5) conclusionRead the following account of an environmental problem and then answer questions I through 4on your answer paper using one or more complete sentences.The Plight of the Piping PloverThe piping plover is a small sparrow-like shore bird that nests in the sand near the water on remotebeaches and barrier islands along the Atlantic and Gulf coasts. Since they blend in so well with theirsuroundings, the nests are often trampled upon unknowingly by bathers and people who want to fish. Inaddition, some nearby residents like to use their all terrain vehicles(ATV's) for recreational use along theshore. Environmental groups have drawn up petitions against the destruction of the nest sites becauseclaim that the piping plover is a threatened species that could become extinct if measures are not talprotect its habitat.The State Governor, and you, as the Mayor of the Town of Birdsville have received petitions andthreatening calls from both sides on this issue. The Governor, who is running for re-election, instrucyou to come up with a quick resolution to this problem.1. Identifv the problem bv explaining the groups in conflict. 5 pointsII...

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12. Which factor is a major cause of global warming? 1) increased number of green plants 2) decrease in atmospheric CO. 3) increased burning of fuels d) increase in photosynthesis