IB Environmental Systems and Societies SL - 2026
Questionbank
The IB Environmental Systems and Societies SL (Standard Level) 2026 Questionbank is a great source of practice questions, coming from the entire syllabus! Each question comes with a clear markscheme and solution video, with an experienced IB teacher going through the question step-by-step. The questions are organized by topic and arranged by difficulty, making it the perfect resource for studying a particular concept.
Topic 1
Foundation
1.2 - Systems
System Diagrams, Open & Closed Systems, Gaia, Feedback Loops, Equilibrium, Tipping Point, Model, Emergent, Resilience
1.3 - Sustainability
Development, Justice, Inequalities, Indicators, Footprint, Biocapacity, SDGs, Planetary Boundaries, Doughnut, Circular
Topic 2
Ecology
Topic 2 All
All Questions in Topic 2 Ecology
RV Free
2.1 - Species to Ecosystems
Classification, (A)biotic, Carrying Capacity, Limiting Factors, Population Growth, Sampling, Lincoln, Habitat, Keystone
RV Free
2.2 - Energy & Biomass
Photosynthesis, Respiration, Thermodynamics, Food Chain & Web, Trophic Level, Productivity, Pyramids, Non-Biodegradeable
RV Free
2.3 - Biogeochemical Cycles
Stores, Sinks, Sources, Carbon Cycle, Carbon Sequestration, Fossil Fuels, Ocean Acidification
RV Free
2.4 - Climate & Biomes
Weather, Tricellular Model of Atmospheric Circulation, Ocean Currents, Global Warming, Biome Shift
RV Free
2.5 - Zonation & Succession
Transects, Environmental Gradient, Sere, Climax Community, Primary & Secondary Succession
RV Free
Topic 3
Biodiversity & Conservation
Topic 3 All
All Questions in Topic 3 Biodiversity & Conservation
RV Gold
3.1 - Biodiversity & Evolution
Natural Selection, Speciation, Richness & Evenness, Simpson's Reciprocal Index, Habitat, Species and Genetic Diversity
RV Gold
3.2 - Human Impact on Biodiversity
Direct & Indirect Threats, Invasive Species, IUCN Red List, Tragedy of the Commons
RV Gold
3.3 - Conservation & Regeneration
Species- & Habitat-based, ex & in situ, CITES, CBD, Flagship & Keystone Species, Edge Effect, Corridor, Rewilding
RV Gold
Topic 4
Water
Topic 4 All
All Questions in Topic 4 Water
RV Gold
4.1 - Water Systems
Hydrological Cycle, Glaciers, Groundwater, Evapotranspiration, Precipitation, Run-off, Infiltration, Steady State
RV Gold
4.2 - Water Access & Use
Water Security, Scarcity and Conservation, Dams, Rainwater, Desalination, Wetlands
RV Gold
4.3 - Aquatic Food Systems
Phytoplankton, Macrophytes, Trawling, Ghost Fishing, Maximum Sustainable Yield, Collapse, MPAs, Aquaculture
RV Gold
4.4 - Water Pollution
Sewage, Run-off, Oil Spills, Plastic, Water Quality Index, Biochemical Oxygen Demand, Eutrophication
RV Gold
Topic 5
Land
Topic 5 All
All Questions in Topic 5 Land
RV Gold
5.1 - Soil
Soil Profile, Horizon, Texture, Weathering, Erosion, Leaching, Nitrogen, Phosphorus, Potassium, Sand, Silt, Clay, Humus
RV Gold
5.2 - Agriculture & Food
Farming, Crops, Livestock, Food Waste, Distribution and Security, Green Revolution, Fertilisers, Soil Conservation, Diet
RV Gold
Topic 6
Atmosphere & Climate Change
Topic 6 All
All Questions in Topic 6 Atmosphere & Climate Change
RV Gold
6.1 - The Atmosphere
Tricellular Model, Greenhouse Effect, GHGs, Solar Radiation
RV Gold
6.2 - Climate Change - Causes & Impacts
Carbon Dioxide, Enhanced Greenhouse Effect, Global Warming, Biome Shift, Resilience, Albedo, Methane, Planetary Boundary
RV Gold
6.3 - Climate Change - Mitigation & Adaptation
Global Action, Decarbonisation, National Adaptation Programmes of Action (NAPA)
RV Gold
6.4 - Stratospheric Ozone
UV Radiation, Mutation, Cancer, Sunburn, Cataracts, ODSs, CFCs, Ozone Holes, Montreal Protocol, Planetary Boundary
RV Gold
Topic 7
Natural Resources
Topic 7 All
All Questions in Topic 7 Natural Resources
RV Gold
7.1 - Natural Resources
Natural Capital & Income, Goods, Services, Ecosystem Services, Renewable, Value, Dynamic, Resource Security
RV Gold
7.2 - Energy Sources
Renewable, Fossil Fuels, Nuclear, Intermittency, Storage, Consumption, Choices, Conservation, Efficiency
RV Gold
7.3 - Solid Waste
SDW, E-Waste, Food, Biohazardous, Pollution, Prevent, Restore, Landfill, Incineration, Recycle, Export, Energy, Compost
RV Gold
Topic 8
Human Populations & Urban Systems
Topic 8 All
All Questions in Topic 8 Human Populations & Urban Systems
RV Gold
8.1 - Human Populations
Births, Deaths, Migration, TFR, DT, NIR, Life Expectancy, Growth, Age-Sex Pyramids, Demographic Transition Model (DTM)
RV Gold
8.2 - Urban Systems & Urban Planning
Urbanisation, Population Density, Buildings, Infrastructure, Rural-Urban Migration, Suburbanisation, Urban Land Use
RV Gold
8.3 - Urban Air Pollution
Primary Pollutants, Nitrogen Oxides, Sulfur Dioxide, Carbon Monoxide, Particulate Matter, Fossil Fuels, Acid Rain
RV Gold
Tools & Inquiry
All
All Questions in Tools & Inquiry
RV Gold
T1 - Experimental Techniques
Dichotomous Keys, Quadrats, Transects, Lincoln, Abiotic Factors, Surveys, Sampling, Diversity, Populations, Biomass
RV Gold
T3 - Mathematical Tools
Calculations, Interpretation of Data, Statistics, Simpson's, Lincoln, NIR, Doubling Time
RV Gold
T4 - Systems & Models
Systems Diagrams, Flow Diagrams, Models
RV Gold
I - Investigations
Designing Investigations, Processing Data, Concluding and Evaluating
RV Gold
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