Practice IB Environmental systems and societies (ESS) Topic Topic 2: Ecology with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for Topic 2: Ecology and mirrors Paper 1, 2 style where relevant.
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Describe three factors that can limit population growth in nature.
Describe two ecosystem services provided by healthy ecosystems.
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.
Explain the First Law of Thermodynamics and its relevance to ecosystem energy flow.