IB Environmental Systems and Societies SL - 2025
Questionbank
The IB Environmental Systems and Societies SL (Standard Level) 2025 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
Foundations of ESS
1.1 - Environmental Value Systems
Historical Influences, EVS, Anthropocentric, Ecocentric, Technocentric
1.2 - Systems & Models
System Diagrams, Storages, Flows, Transfers, Transformations, Open & Closed Systems, Models
1.3 - Energy & Equilibria in Systems
Laws of Thermodynamics, Conservation of Energy, Negative & Positive Feedback Loops, Stability, Resilience, Tipping Point
1.4 - Sustainability
Sustainable Development, Natural Resources, Capital and Income, Goods, Services, EIA, Ecological Footprint (EF)
1.5 - Pollution
Non-Point & Point Source, Persistent, Biodegradable, Acute, Chronic, Primary, Secondary, DDT, Pollution Management
Topic 2
Ecosystems & Ecology
Topic 2 All
All Questions in Topic 2 Ecosystems & Ecology
RV Free
2.1 - Species & Populations
Habitat, Biotic & Abiotic Factors, Interactions, S-Curve, J-Curve, Limiting Factors, Carrying Capacity
RV Free
2.2 - Food Webs & Energy
Respiration, Photosynthesis, Food Chains, Trophic Levels, Ecological Pyramids, Bioaccumulation, Biomagnification
RV Free
2.3 - Productivity & Nutrient Cycles
Solar Radiation, Net, Gross, Primary, and Secondary Productivity, Maximum Sustainable Yield, Carbon & Nitrogen Cycles
RV Free
2.4 - Biomes, Zonation, and Succession
Tricellular Model, Biome Shift, Habitat, Species, and Genetic Diversity, r- & K-Strategists, Pioneer & Climax Community
RV Free
2.5 - Investigating Ecosystems
Key, Sampling, Biomass, Quadrat, Capture-Mark-Recapture, Lincoln, Species Richness & Diversity, Simpson, Abiotic Factor
RV Free
Topic 3
Biodiversity & Conservation
Topic 3 All
All Questions in Topic 3 Biodiversity & Conservation
RV Gold
3.1 - Biodiversity
Species, Habitat, and Genetic Diversity, Species Richness & Evenness, Diversity Index
RV Gold
3.2 - Evolution & Extinction
Natural Selection, Survival of the Fittest, Speciation, Plate Tectonics, Mass Extinctions
RV Gold
3.3 - Threats to Biodiversity
Habitat Destruction, Invasive Species, Pollution, Overharvesting, IUCN Red List, Conservation Status, Tropical Biomes
RV Gold
3.4 - Conservation of Biodiversity
NGOs, Conventions, Protected Areas, Habitat & Species-Based Conservation, CITES, Flagship & Keystone Species, Zoos
RV Gold
Topic 4
Water & Aquatic Food Production
Topic 4 All
All Questions in Topic 4 Water & Aquatic Food Production
RV Gold
4.1 - Water Cycle & Oceanic Circulation
Hydrological Cycle, Aquifer, Glacier, Ice Cap, Evaporation, Precipitation, Freshwater, Saltwater, Ocean Conveyor Belt
RV Gold
4.2 - Freshwater Resources
Supply, Access, Irrigation, Reservoirs, Desalination, Aquifers, Rainwater Harvesting, Conflict
RV Gold
4.3 - Aquatic Food Production
Marine, Freshwater, Phytoplankton, Whales, Wild Fisheries, Fish Stocks, Aquaculture, Maximum Sustainable Yield
RV Gold
4.4 - Water Pollution
Eutrophication, Dead Zones, Plastic, Runoff, Sewage, Biochemical Oxygen Demand (BOD), Indicator Species, Biotic Index
RV Gold
Topic 5
Soil & Terrestrial Food Production
Topic 5 All
All Questions in Topic 5 Soil & Terrestrial Food Production
RV Gold
5.1 - Soil Structure & Systems
Soil Profile, Leaching, Erosion, Sand, Silt, Clay, Loam, Soil Texture Triangle
RV Gold
5.2 - Terrestrial Food Production
Farming, Fertilisers, Pesticides, Yield, Food Waste, Food Choices, Subsistence & Commercial Farming, Vegetarianism
RV Gold
5.3 - Soil Degradation & Conservation
Fertility, Deforestation, Grazing, Monoculture, Erosion, Desertification, Salination, Terracing, Marginal Lands
RV Gold
Topic 6
Atmosphere
Topic 6 All
All Questions in Topic 6 Atmosphere
RV Gold
6.1 - Atmospheric Structure & Function
Natural Greenhouse Effect, Troposphere, Stratosphere, Clouds, Albedo
RV Gold
6.2 - Stratospheric Ozone
Hole in Ozone Layer, UV radiation, CFCs, Aerosols, Montreal Protocol, Skin Cancer, Phytoplankton
RV Gold
6.3 - Photochemical Smog
Urban Pollution, Secondary Pollutant, Nitrogen & Sulfur Oxide, Soot, Tropospheric Ozone, Thermal Inversion
RV Gold
6.4 - Acid Deposition
Fossil Fuels, Acid Rain, Nitrogen & Sulfur Oxides, Wet & Dry Deposition, Direct & Indirect Effect, Lime
RV Gold
Topic 7
Climate Change & Energy Production
Topic 7 All
All Questions in Topic 7 Climate Change & Energy Production
RV Gold
7.1 - Energy Choices & Security
Fossil Fuel, Carbon Dioxide Emissions, Renewables, Nuclear, Energy Security & Strategy, Energy Efficiency & Conservation
RV Gold
7.2 - Climate Change - Causes & Impacts
Enhanced Greenhouse Effect, Greenhouse Gases (GHGs), Sea Level Rise, Global Temperature, Methane, Extreme Weather Events
RV Gold
7.3 - Climate Change - Mitigation & Adaptation
Greenhouse Gas Emissions, Geo-Engineering, Carbon Sinks, Flood Defences, Desalinization, CDR, UN-REDD, CCS, IPCC
RV Gold
Topic 8
Human Systems & Resource Use
Topic 8 All
All Questions in Topic 8 Human Systems & Resource Use
RV Gold
8.1 - Human Population Dynamics
Births, Deaths, Fertility, CBR, CDR, TFR, DT, NIR, Population Pyramids, Demographic Transition Model (DTM)
RV Gold
8.2 - Resource Use
Renewable & Non-Renewable Natural Capital, Sustainable Use, Value of Natural Capital
RV Gold
8.3 - Solid Domestic Waste
SDW, Non-Biodegradable, Plastic, Landfill, Incineration, Recycling, Composting, Circular Economy
RV Gold
8.4 - Human Population Carrying Capacity
Extending Carrying Capacity, Ecological Footprint (EF), Limits to Human Population Growth
RV Gold
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