Unit 1: Foundations of ESS
Topic 1.2: Models, Systems and Loops Questions
Practice 20 exam-style questions for IB ESS Topic 1.2. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
11 mark
2025
Which type of model mainly uses equations (for example y = mx + b)?
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A class studies the community of plants growing on a school field. Outline two features that show this plant community is a system.
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2025
Which type of model uses arrows and shapes to show relationships?
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2025
Outline two uses of models in environmental science.
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2025
Which type of model predicts future climate conditions?
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A student describes a school pond as "a system". Outline what is meant by a system.
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A class studies a school pond instead of a large lake. Outline one advantage and one disadvantage of studying a system at this small scale.
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2025
Why are models used in environmental science?
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2025
Which model best shows feeding relationships?
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2025
A paragraph that describes how a system works (without a diagram) is a…
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2026
State one characteristic of a positive feedback loop.
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2026
Define the term resilience in the context of environmental systems.
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A new motorway is built through farmland. Outline what is meant by the anthroposphere, using this example.
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2026
Define the term negative feedback loop.
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2025
Which statement about models is correct?
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2026
Define the term storage (stock) in a systems model.
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2025
Which statement best defines a model in ESS?
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