Science 30 January 1999 Grade 12 Diploma Examination

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Use the following information to answer the next question.Pollutants1 SO 2(g)2 Raw sewage3 Heavy metals4 CFCsNumerical Response06. Match each pollutant, as numbered above, with its effect, as listed below. Useeach number only once.Nervous system damage _____ (Record in the first column.)High biological oxygen demand (BOD) _____ (Record in the second column)Ozone depletion _____ (Record in the third column.)Acid deposition _____ (Record in the fourth column.)(Record your answer in the numerical-response section on the answer sheet.)16
Use the following information to answer the next question.Sources of Pollutants and Their EffectsSources Compounds EffectsEnergyproductionSulphurdioxideAcidificationAgricultureAmmoniaEutrophicationof lakesIndustryNitrogenoxidesTrafficVOCRegionalozoneCarbonmonoxideFreetroposphericozoneMethane28. Taking into account the sources of nitrogen oxide shown in the chart above, onecan infer that the release of nitrogen oxide is mainly fromA. the production of ammoniaB. the combustion of fossil fuelsC. algal bloom in lakes and oceansD. extensive use of fertilizers in agriculture and gardening17
Page 1 and 2: cience 30 Science 30 Science 30 Sci
Page 3 and 4: Multiple Choice• Decide which of
Page 5 and 6: The principles of biology, chemistr
Page 7 and 8: 6. The blood in the veins of the le
Page 9 and 10: Use the following additional inform
Page 11 and 12: 12. The zygote is cultured and is i
Page 13: 15. Sparks from static electricity
Page 16 and 17: Use the following information to an
Page 18 and 19: 24. The use of pesticides may pose
Page 24 and 25: 31. Which of the following graphs r
Page 30 and 31: A series of experiments were conduc
Page 34 and 35: Long Answer - 15%1. Many scientists
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Page 42 and 43: Scoring Guide - Short Answer Januar
Page 44 and 45: Scoring Guide - Long Answer 2 Janua

Science 30 January 1999 Grade 12 Diploma Examination

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