IB ESS SL 1.2.8 Negative Feedback Loops Question Bank
Explain how negative feedback counteracts change and stabilises a system.
- Syllabus
- First assessment 2026
- Course
- ESS SL
- Level
- SL
Exam points
- identify the output that inhibits or reverses the original process
- explain how a negative feedback loop reduces deviation
- apply the idea to a system example such as Daisyworld
1.2.8—Negative feedback loops question 1
[Maximum number: 3]
Explain how predation may lead to:
stability in a population of the prey species.
as population of prey increases, more food is available for predators; this leads to increase of predator population;
...so there is more predation / so prey population decreases; ...leading to cyclical changes around a stable equilibrium; this is negative feedback / density dependent mechanism;
These marks can be awarded for appropriately annotated diagram, clearly demonstrating the marking points.
Answers that incorporate good/strong examples can help the student gain marks for Eol.
Marking guidance:
Do not award marks for just giving examples in this question.
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