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IB ESS 4.1.4 Hydrological cycle flows

IB ESS 4.1.4 Hydrological cycle flows
IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise recognising water-cycle flows and calculating changes in infiltration, sediment flow or atmospheric inputs from figures.

How this is tested

  • state water-cycle inputs to the atmosphere such as evaporation and transpiration
  • calculate differences or percentage changes in hydrological data, including infiltration or sediment flow
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