IB ESS HL 1.2.8 Negative Feedback Loops Questions

Practise HL questions by analysing how negative feedback damps deviations in predator–prey and atmospheric systems, then evaluating stability and restoration.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • Define negative feedback as an output that dampens deviation and represent its causal return to equilibrium.
  • Analyse predator–prey regulation as density-dependent negative feedback around a dynamic equilibrium.
  • Explain the atmospheric temperature loop from warming through evaporation and cloud reflection to cooling.
  • Evaluate feedback for stability, resilience and restoration in named ecological systems.

IB ESS HL 1.2.8 Negative Feedback Loops Questions question 1

[Maximum number: 2]
Impact of deforestation on the water cycle

Figure:Impact of deforestation on the water cycle

Describe the negative feedback mechanism by which cloud formation may moderate global temperature.

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