Practice IB Environmental systems and societies (ESS) Topic 2.5 Zonation, Succession and Change in Ecosystems with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 2.5 Zonation, Succession and Change in Ecosystems and mirrors Paper 1, 2 style where relevant.
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Explain how you would measure the impact of pollution on a freshwater ecosystem.
Explain how abiotic factors can be measured in an ecosystem investigation.
Choose two factors and describe the measurement method for each.
Describe two methods for estimating population size in an ecosystem.
Identify two distinct zones visible in the diagram.
Explain how one abiotic factor changes across these zones.
Explain the importance of replication in ecological field studies.