1
3 marks
List three primary pollutants from the combustion of fossil fuels.
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Syllabus Edition
First teaching 2015
Last exams 2025
Photochemical Smog (DP IB Environmental Systems & Societies (ESS): SL): Exam Questions
42 mins10 questions
2
2 marks
Complete the following sentence:
Tropospheric ozone is an example of a secondary pollutant, formed when oxygen molecules react with oxygen atoms that are released from __________ dioxide in the presence of __________.
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3
2 marks
Thermal Inversions can contribute to the formation and persistence of smog in urban areas.
Explain what a thermal inversion is, in this context.
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4
2 marks
Briefly outline how catalytic converters can reduce urban air pollution.
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1
3 marks
Explain the processes through which the combustion of fossil fuels contributes to the formation of photochemical smog.
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2
4 marks
Outline four effects of tropospheric ozone and smog.
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3a
4 marks
The graph below shows global tropospheric ozone levels between 1988 and 2023.
Suggest possible reasons for the overall trends in global tropospheric ozone levels shown by the graph.
3b
2 marks
Use the figure in part (a) to calculate the average annual decrease in tropospheric ozone concentration (in parts per billion) between 1991 and 2010. Show your working.
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4
4 marks
List four possible air pollution management strategies that can be used to reduce tropospheric ozone and photochemical smog.
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1
7 marks
Explain how changes in the concentration of tropospheric ozone in the atmosphere might affect global biodiversity.
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2
9 marks
Evaluate pollution management strategies for reducing photochemical smog.
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