IB ESS SL 2.2.1 Ecosystem Sustenance Questions
Prepare for IB ESS SL 2.2.1 by tracing sunlight as energy input and comparing how energy flows while matter cycles through open ecosystems.
- Syllabus
- First assessment 2026
- Course
- ESS SL
- Level
- SL
Exam points
- identify sunlight or solar radiation as the main energy input sustaining a photosynthetic ecosystem
- compare energy and matter movement through inputs, outputs, transformations, cycling and conservation in ecosystems
IB ESS SL 2.2.1 Ecosystem Sustenance Questions question 1
Figure:Example of a lake ecosystem
Figure 1 shows an example of a lake ecosystem.
Rooting flowering plants: producers
Birds: secondary and tertiary consumer eg kingfisher
Floating plants: producers eg lilies, water fern
Frog: secondary consumer
State the source of energy for this ecosystem.
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