IB ESS 4.1.3 Hydrological cycle stores
IB ESS 4.1.3 Hydrological cycle stores

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026
Practise naming freshwater stores and using hydrological-cycle figures to distinguish visible stores from omitted natural reservoirs.
How this is tested
- state freshwater stores missing from a figure,
- identify natural water sources in a named area, using local evidence
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