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IB ESS HL 4.1.4 Hydrological Cycle Flows Questions

Interpret flows of water between hydrological stores.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify hydrological inputs and outputs such as rainfall, river inflow, runoff, groundwater flow, evaporation, transpiration, seepage and abstraction
  • label or calculate water flows between stores using diagrams, percentages and lake or catchment data
  • explain how changes in infiltration, runoff, evaporation, glacier melt and abstraction affect river or lake volume, water quality and downstream ecosystems

Learn this topic

Study 4.1.4—Hydrological cycle flows conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 4.1.4 Hydrological Cycle Flows Questions question 1

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Impact of deforestation on the water cycle

Figure:Impact of deforestation on the water cycle

State one input of water into the atmosphere not shown in the deforestation and water-cycle diagram shown above.

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