Topic 1: Foundation
Topic 2: Ecology
2.1 Individuals, populations, communities and ecosystems
2.2 Energy and biomass in ecosystems
2.3 Biogeochemical cycles
2.4 Climate and biomes
2.5 Zonation, succession and change in ecosystems
Topic 3: Conservation and biodiversity
Topic 4: Water
Topic 5: Land
Topic 6: Atmosphere and climate change
Topic 7: Natural resources
Topic 8: Human populations and urban systems
HL lenses
View a summary cheatsheet for 2.2 Energy and biomass in ecosystems
2.2A First law of thermodynamics
2.2B Photosynthesis and cellular respiration
2.2C Second law of thermodynamics
2.2D Food Chain and Energy Loss
2.2E Gross productivity and Net productivity
2.2F Food Web and Biomass
2.2G Ecological Pyramids
2.2H Pollutants and human activities
2.2I Productivity and Ecological efficiency (HL)
2.2J Modes of nutrition (HL)
