Unit 7: Option A — Freshwater: Drainage Basins
Topic 7.3: Water scarcity and water quality Questions
Practice 20 exam-style questions for IB Geography Topic 7.3. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Outline2 marks
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Eutrophication has occurred in a freshwater lake. Outline one environmental problem this causes and develop it briefly.
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During eutrophication, dissolved oxygen in the water falls because…
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Salinisation in irrigated dry regions happens mainly because…
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Which is a physical, rather than human, cause of severe eutrophication?
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Outline two ways in which severe water scarcity can affect the people living in a region.
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Explain how the over-abstraction of groundwater can worsen water scarcity over time.
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Physical (absolute) water scarcity happens when…
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Explain the difference between physical and economic causes of water scarcity, using an example of each.
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Outline one environmental impact of increased human pressure on aquifers, and develop how it occurs.
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Outline one physical cause of water scarcity in a water-stressed region, and develop why it reduces supply.
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The table shows water quality at four sites down a river that flows past farmland.
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Parts of a freshwater lake have become heavily eutrophic. Explain one human reason and one physical reason for this.
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Explain one way agriculture pressures wetlands and one way that changing the water flow pressures them.
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The table compares an algal bloom (eutrophication) in a lake's southern bay in two years.
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Outline one economic impact that drought has on farming, and develop why it happens.
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The table summarises the share of land in extreme drought across five latitude bands of a large country on one date.
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Explain one way that salinisation harms farmers.
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Explain one way that farming activity can lead to salinisation.
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The table shows the per-capita renewable water availability of five countries in 1990 and 2020 (m3 per person per year).
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Eutrophication is the enrichment of water with nutrients such as…
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