Unit 8: Option B — Oceans and Coastal Margins
Topic 8.3: Managing coastal margins Questions
Practice 20 exam-style questions for IB Geography Topic 8.3. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1State3 marks
The table shows the recorded seawater pH near a coral reef over four decades.
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Most marine pollution starts on land and reaches the ocean via…
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One reason ocean pollution is hard to manage is that the ocean is…
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Plastic pollution concentrates along coastlines mainly because…
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Explain two reasons why conflicts over coastal management are often hard to resolve.
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Explain why managing a fragile coastal ecosystem, such as a coral reef or mangrove forest, often creates conflict between stakeholders.
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A coral-reef marine park places a strict no-take Preservation Zone in one area of the coast. Outline one physical and one human reason that could explain why the zone is sited there.
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A sea wall in one place can harm a neighbouring coast because it…
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Suggest two reasons why managed retreat is often a controversial way to manage an eroding coast.
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Explain how rising atmospheric carbon dioxide leads to ocean acidification.
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Explain one advantage and one disadvantage of using hard engineering, such as a sea wall, to defend a coast.
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Explain how nutrient pollution from the land can damage a coastal marine ecosystem.
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Outline two strategies that can reduce the risk of flooding on a low-lying coast, and state how each works.
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Explain why some ocean plastic ends up far out at sea rather than only on coastlines.
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Suggest two strategies that could reduce the amount of plastic entering the ocean.
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Outline one reason why plastic pollution builds up along ocean coastlines, and develop your answer.
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The table shows the main sources of plastic entering the ocean.
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Outline one environmental problem caused by the growth of aquaculture, and develop your answer.
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The table compares four coastal-management strategies a council is considering for an eroding stretch of coast.
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Ocean acidification is caused by seawater absorbing…
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