IB ESS SL 1.2.5 Open and Closed Systems Question Bank
Classify systems by exchanges of energy and matter across their boundaries.
- Syllabus
- First assessment 2026
- Course
- ESS SL
- Level
- SL
Exam points
- identify the system boundary and relevant components
- classify each flow or exchange precisely
- explain the system behaviour using energy, matter and interaction terms
1.2.5—Open vs. closed systems question 1
Figure:Simplified map of the Lake Shergar area
the municipal-waste recycling chart shown above: A simplified diagram of the Lake Shergar area.
The lake provides a water supply for the local population.
Outline why this lake may be considered an open system.
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