These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

• partial: Understand the paradox of nutrient cycling in rainforests — despite lush growth, rainforest soil is typically thin and nutrient-poor because most nutrients are locked in living organisms, not the soil; decomposition is rapid in the warm, wet conditions, and nutrients released from dead material are immediately absorbed by plant roots and fungi, creating a fast, closed-loop recycling system

  Bounded objective: Trace nutrient recycling and question oversimplified soil claims. Canonical thin-soil/closed-loop/universal farm-failure claims explicitly limited. Research search excerpts show seasonal/site variation, not full-text review or support for every source generalisation.

• blocked: Explain that rainforest soil is thin and nutrient-poor despite the lush growth above

  Universal thin/nutrient-poor soil statement not supported; site variation explicitly taught.

• partial: Describe the rapid decomposition cycle: dead material → decomposers → nutrients released → immediately absorbed by roots

  Simplified litter/decomposer/root cycle provided; immediate/closed claims not asserted.

• partial: Explain why clearing rainforest for farming fails after a few years — once the trees are gone, the nutrients are lost

  Removal/loss mechanism plausible in stated model; universal timed farming failure rejected.

• partial: Can {{name}} explain the surprising fact that rainforest soil is actually poor and thin — that the nutrients aren't in the ground but locked inside the living plants and animals, constantly being recycled?

  Try offers claim-evaluation for the bounded objective; it does not establish every part of the source assessment. Canonical thin-soil/closed-loop/universal farm-failure claims explicitly limited. Research search excerpts show seasonal/site variation, not full-text review or support for every source generalisation.

• Canonical thin-soil/closed-loop/universal farm-failure claims explicitly limited. Research search excerpts show seasonal/site variation, not full-text review or support for every source generalisation.