IB ESS — Topic 2.7

Biogeochemical cycles

Topic 2.7 covers the carbon, nitrogen, and phosphorus cycles, including how human activities alter these natural processes. Students learn to draw and interpret cycle diagrams, explain key transformations, and evaluate the consequences of disrupted nutrient cycles for ecosystems.

Sub-topics in Topic 2.7

2.7.1Hydrological cycle2.7.2Nitrogen cycle2.7.5The carbon cycle

Study Topic 2.7: Biogeochemical cycles

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