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IB ESS 2.3.2 Cycle components

IB ESS 2.3.2 Cycle components
IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise distinguishing stores, sinks and sources in cycles and applying them to carbon or nutrient-flow contexts.

How this is tested

  • distinguish stores, sinks and sources from whether material is balanced, accumulating or released
  • apply store, sink and source labels to a carbon or nutrient-cycle diagram
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