Unit 6: Atmospheric Systems and Societies
Topic 6.4: Stratospheric Ozone Questions
Practice 20 exam-style questions for IB ESS Topic 6.4. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1outline3 marks
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A doctor in a high-UV region advises extra eye protection. Outline how increased UV-B can affect human health.
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A student confuses the greenhouse effect with the ozone layer. Outline one key difference between them.
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• Aimnova PP-practice — 6.4.3
State what the Montreal Protocol is and outline its main aim.
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Define the term Montreal Protocol.
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State which layer of the atmosphere contains most ozone that protects life on Earth.
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Define the term ozone-depleting substance (ODS).
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• Aimnova PP-practice — 6.4.1
Outline the role of the ozone layer in the stratosphere.
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• Aimnova PP-practice — 6.4.2
Identify two human activities that release ozone-depleting substances into the atmosphere.
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State one example of an ozone-depleting substance.
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State one reason the Montreal Protocol is often considered successful.
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A student says: “CFCs destroy ozone because they are acidic.” State whether this is correct and justify your answer.
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Define the term ozone layer.
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State whether ozone in the troposphere is beneficial or harmful, and give one reason.
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Explain how chlorine from CFCs can destroy many ozone molecules.
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Outline one co-benefit of the Montreal Protocol for climate change mitigation.
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A company claims: “Because of the Montreal Protocol, the ozone hole has already fully disappeared.” State whether this is correct and justify your answer.
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A poster shows that one chlorine atom can destroy thousands of ozone molecules. Suggest one reason this is possible.
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A science class draws the ozone formation cycle. Explain how ozone is formed in the stratosphere.
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A developing country was given longer deadlines to phase out CFCs. Outline why this “differentiated responsibility” approach can improve cooperation.
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Explain one role of the Multilateral Fund in the Montreal Protocol.
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