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IB ESS SL 1.2.8 Negative Feedback Loops Questions

Practise SL questions by tracing how negative feedback reverses changes, stabilises ecosystems and regulates temperature through complete causal loops.

Syllabus
First assessment 2026
Course
ESS SL
Level
SL

Exam points

  • Draw a complete causal loop in which an output reverses the initial change and moves the system toward equilibrium.
  • Use predator–prey evidence to explain how density dependence stabilises prey numbers through negative feedback.
  • Trace rising temperature through evaporation, cloud cover, reflection and cooling in a negative feedback loop.
  • Evaluate how negative feedback maintains stability or helps restore a named plant community after disturbance.

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Study 1.2.8—Negative feedback loops conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS SL 1.2.8 Negative Feedback Loops Questions question 1

[Maximum number: 3]

Explain how predation may lead to:

stability in a population of the prey species.

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