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IB Environmental Systems and Societies Practice Exam 2026 – Comprehensive Study Guide course image
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  • What environmental issue can arise from the characteristics of tropical rainforest soil?
  • Which of the following describes an open system?
  • Which of the following aspects relates to direct value?
  • What constitutes species diversity?
  • Which type of organism is classified at trophic level 1?
  • What does bioaccumulation refer to?
  • What are organic fertilizers primarily made from?
  • What does static equilibrium indicate?
  • Which term describes a balanced state among components of a system?
  • Why is it important for humans to consume a large amount of food?
  • What is a key feature of the vegetation structure in the Arctic Tundra?
  • Positive feedback primarily leads to which of the following?
  • What is the sustainable yield?
  • What type of emissions are notably high in California commercial farming?
  • What is an advantage of using a pyramid of numbers?
  • What role do halocarbons play in environmental science?
  • How can a population become a new species?
  • Which type of strategist typically invests in a few offspring to enhance survival rates?
  • In the context of population growth, what typically follows after an increase in resources availability?
  • Which of the following describes a 'plagiosere'?
  • Subsistence farming can be described as what?
  • What does the ecological footprint measure?
  • What does genetic diversity refer to?
  • What type of organisms are heterotrophs?
  • Which of the following is an example of a macronutrient?
  • What do illuvial layers in soil signify?
  • How is economic value determined?
  • What does existence value refer to?
  • What characterizes micronutrients?
  • During energy transfer in an ecosystem, what happens to the majority of energy passed through trophic levels?
  • Why is understanding food webs important in environmental science?
  • What is a major environmental goal of green politics regarding forests?
  • In what form must macronutrients be for plants to absorb them?
  • Which farming method is characterized by high environmental impact due to factors like antibiotic use?
  • Which value recognizes the right of each species to exist, regardless of human needs?
  • Which term describes succession that occurs in aquatic environments?
  • Which of the following statements best describes biodiversity in the Arctic Tundra?
  • Which of the following describes transformation related to energy?
  • What does sustainability refer to in environmental terms?
  • What is the relationship between total fertility rate and crude birth rate?
  • What characterizes 'J curve' growth in populations?
  • How is energy primarily stored in the Arctic Tundra ecosystem?
  • What type of value refers to benefits obtained indirectly from ecosystems?
  • Which of the following is true about deserts?
  • What is the total fertility rate?
  • Which group of organisms includes species that do not possess a backbone?
  • Which of the following best describes 'Green Politics'?
  • Which farming approach incorporates both crop cultivation and animal husbandry?
  • What does the baseline study in an EIA measure?
  • What is the composition of soil?
  • Which of the following best describes commercial farming?
  • What role do limiting factors play in population growth?
  • What does maximum sustainable yield represent?
  • What does entropy measure in a system?
  • Which trophic level is suited for carnivores?
  • What is meant by "survival of the fittest"?
  • Which farming practice is noted for being high labor and low technology?
  • Which term describes the total gain in energy by consumers through absorption?
  • Which type of feedback promotes stability in an ecosystem?
  • Which farming type involves both crops and animals as a self-sustaining system?
  • What type of farming generally targets profit maximization per area cultivated?
  • Which type of species has a significant impact on its ecosystem due to its role?
  • Which legal framework regulates international trade in endangered species?
  • What does a high diversity index typically indicate?
  • What is the result of the process of photosynthesis?
  • What is the main concept of evolution?
  • What is the main environmental factor that can influence zonation?
  • Which type of value refers to direct benefits derived from natural resources?
  • What is the term used for the additional energy required to sustain a system, especially in reference to solar energy?
  • Which of the following is an example of point-source pollution?
  • What is the term for the maximum population size that can be sustained over a long period of time?
  • What role does photosynthesis play in renewable natural capital?
  • Which relationship is defined as mutualism?
  • What is a diversity index used for?
  • What is isolation in the context of evolutionary biology?
  • Which of the following best defines a climax community?
  • What does the pyramid of biomass illustrate?
  • What is a key feature of the ethical/intrinsic value of biodiversity?
  • What role do transfers play in ecosystems?
  • In the ecological context, what is a 'prisere'?
  • What organization is recognized as the United Nations Environment Program?
  • Which of the following exemplifies a transformation process?
  • What does the 2nd law of thermodynamics state about energy conversions?
  • Which of the following factors is involved in natural selection?
  • How is the age-specific birth rate defined?
  • Why is recovery often difficult in tropical rainforests?
  • What does the term habitat refer to?
  • What is meant by Gross Primary Productivity (GPP)?
  • Which organisms are classified as producers in an ecosystem?
  • What does the crude death rate indicate?
  • What is a key factor in understanding demographic transitions in developed countries?
  • What does biochemical oxygen demand (BOD) indicate?
  • What is the main goal of mixed farming?
  • What does the term "trophic level" refer to?
  • What does the pyramid of numbers depict?
  • What characterizes non-renewable natural capital?
  • What is the primary purpose of cash cropping?
  • What does the 'S curve' in population dynamics represent?
  • What is the primary function of decomposers in an ecosystem?
  • Biomass is defined as:
  • What is the study of plate tectonics primarily concerned with?
  • How is total fertility typically measured?
  • What type of succession begins on dry land?
  • Which value is associated with the human appreciation of natural beauty yet has no market price?
  • Feedback in a system can best be defined as?
  • What defines a community in ecological terms?
  • Which factor significantly impacts biomass accumulation in tropical rainforests?
  • What is the primary focus of conserving habitat diversity?
  • What is one way carbon returns to the atmosphere?
  • Which farming type is characterized by a focus on high yield and the use of fertilizers?
  • What type of succession occurs on already developed soils?
  • What best describes the term "replenishable" in environmental contexts?
  • How do ecological services benefit humans?
  • What is biomagnification?
  • What does a species' ecological niche encompass?
  • Which phenomenon is primarily explained by plate tectonics?
  • Which of the following is an example of a density-dependent limiting factor?
  • Which biome has the lowest net primary productivity (NPP)?
  • What type of competition occurs between members of the same species?
  • If a population has a natural increase rate of 1%, how long will it take to double in size?
  • What defines a system in the context of environmental science?
  • What distinguishes renewable natural capital?
  • What is the primary focus of UNESCO?
  • What agricultural practice involves planting different crops successively to improve soil conditions?
  • What characterizes indicator species in an ecosystem?
  • What is meant by population momentum?
  • What does the term "smog" refer to in environmental science?
  • How does the rate of natural increase typically affect population growth?
  • What is an effect of an increase in greenhouse gases?
  • What best defines the relationship between the population of predator and prey?
  • What is the main purpose of the CITES agreement?
  • In a food chain, what do secondary consumers primarily feed on?
  • Which factor has the least impact on the amount of solar energy absorbed by the Earth's surface?
  • What does the term 'diversity' refer to in a scientific context?
  • Which organization is also known as the World Wide Fund for Nature?
  • What describes parasitism?
  • Which of the following reflects anti-natalist policies?
  • What is the primary cause of pollution as defined in environmental science?
  • What is the primary focus of posting farming?
  • Why is understanding the crude death rate important for demographic studies?
  • In captive breeding, what is the primary activity performed with the animals?
  • What is depicted by the pyramid of productivity?
  • What is a primary consequence of high biochemical oxygen demand in a water body?
  • What is a characteristic of hotspots in ecology?
  • What does zonation refer to in ecology?
  • What impact does global warming have on the Earth's temperature?
  • What is the function of the IUCN?
  • What does fertility primarily measure in human populations?
  • How does positive feedback influence a system's behavior?
  • What defines a species in biological terms?
  • What is an ecosystem?
  • Which of the following is an example of a biotic factor?
  • What is a key aspect of transfers in ecosystems?
  • Which equation represents the process of respiration?
  • Which of the following is NOT considered renewable natural capital?
  • Deserts cover what fraction of the world's surface?
  • How does bioaccumulation affect higher trophic levels?
  • What happens to population levels when limiting factors increase in an environment?
  • What does the term 'natural capital' refer to?
  • What is a major biotic factor associated with the Holocene extinction?
  • What is the primary trait of r-strategists?
  • What is the main focus of arable farming?
  • What does a food chain illustrate?
  • What method can help manage pest populations and enhance soil fertility through diversity?
  • What is a food web?
  • What is a feedback loop?
  • Which type of competition can occur between different species?
  • What is the rate of natural increase?
  • Which organisms are specifically associated with breaking down dead organic material?
  • What is the purpose of an Environmental Impact Assessment (EIA)?
  • What does the term 'population density' refer to?
  • Which of the following best describes a resilient ecosystem?
  • How is stability best defined in an ecological context?
  • How do living species in ecosystems typically contribute to the environment?
  • How does primary succession typically begin?
  • In which category do organisms that create their own food through autotrophic means fall?
  • What limitation significantly impacts the growth and reproduction season in the Arctic Tundra?
  • Which of the following factors does NOT influence biodiversity?
  • What is half the carrying capacity referred to as?
  • What defines an abiotic factor in an ecosystem?
  • What does the infant mortality rate measure?
  • In which type of system is energy exchanged but matter is not?
  • What is meant by the term "carrying capacity"?
  • Which type of soil is often considered the most challenging for cultivation?
  • What is the significance of energy subsidies in ecosystems?
  • What can both organic and inorganic materials cause when they enter water bodies?
  • In the Gaia hypothesis, the Earth is compared to which of the following?
  • Which statement describes a characteristic of negative feedback?
  • What does Gross National Production (GNP) measure?
  • What distinguishes commercial farming from other types of farming?
  • Which practice can significantly benefit soil health by breaking pest cycles?
  • What characterizes an unstable equilibrium in a system?
  • Stratification in a rainforest refers to:
  • Which of the following best represents a concept of ecological balance?
  • At what trophic level would you find apex predators?
  • Which of the following statements best describes 'carrying capacity'?
  • Which of the following best describes the structure of a pyramid of productivity?
  • What is the primary role of an umbrella species?
  • What percentage of solar energy reaches the Earth's surface, after accounting for reflection and absorption by the atmosphere?
  • Which type of succession occurs on newly created land?
  • What does an anthropocentric view emphasize regarding the role of humans in the environment?
  • In ecological terms, what is the impact of a stable population?
  • Which theorist proposed that a larger population has a greater ability to feed itself?
  • What does the general fertility rate indicate?
  • How do decomposers contribute to the carbon cycle?
  • Which of the following is an example of replenishable natural capital?
  • Which process involves the energy transfer from glucose in living organisms?
  • What is the main focus of ecological value?
  • What substance do decomposers primarily recycle back into the soil?
  • What is the primary role of carnivores in an ecosystem?
  • Which of the following describes intraspecific competition?
  • What characterizes stable equilibrium?
  • What is a significant drawback of light soil?
  • Which factor contributes to species diversity in an ecosystem?
  • Which type of nutrients are classified as macronutrients?
  • What term is used for the group of organisms of the same species living in the same area?
  • Which of the following describes steady-state equilibrium?
  • What is resilience in ecological terms?
  • What is eutrophication?
  • What is a common consequence of intensive farming methods in beef production?
  • According to the 1st law of thermodynamics, what can be said about energy?
  • Net Secondary Productivity (NSP) accounts for what in consumers?
  • What does speciation refer to?
  • What is the primary focus of research involving population dynamics?
  • What does Net Primary Productivity (NPP) represent?
  • What characteristic defines biodegradable substances?
  • An EIA ideally should be independent from which entity while being funded by them?
  • What does the crude birth rate measure?
  • Which concept excludes human influence from ecological considerations?
  • What is the term for the number of years it would take a population to double its size at its current growth rate?
  • What concept suggests that as the human population increases, it would lead to challenges in feeding itself?
  • What do internal density-dependent limiting factors affect?
  • What characterizes extensive farming?
  • In a predatory-prey relationship, what happens when the population of prey increases?
  • How is habitat diversity defined?
  • What distinguishes non-point source pollution from point-source pollution?
  • Field capacity refers to what aspect of soil?
  • How is the age-specific mortality rate calculated?
  • What does a soil profile reveal?
  • In the carbon cycle, where does carbon originally come from?
  • What is the primary focus of sustainable yield?
  • A primary consumer, such as an herbivore, occupies which trophic level?
  • Competition in ecology refers to which of the following?
  • What is the primary role of producers in an ecosystem?
  • What is a notable environmental concern associated with beef production?
  • What initiates the flow of energy through an ecosystem?
  • What characterizes a tropical rainforest?
  • What agricultural practice is primarily aimed at increasing market production?
  • Which type of farming typically requires less labor and focuses on maximizing outputs?
  • What is a detritus in an ecosystem?
  • Which term refers to the average number of years that a person can be expected to live?
  • California commercial farming typically involves which of the following?
  • Which description fits an isolated system?
  • What is a characteristic feature of captive breeding programs?
  • Which aspect of diversity is crucial for ecosystem resilience?
  • What is the goal of pro-natalist policies?
  • What term describes a community of organisms that is stable and in equilibrium with environmental conditions?
  • What type of climate characterizes the Arctic Tundra?
  • Which of the following reflects indirect value?
  • What are greenhouse gases primarily known for?
  • Which term describes services provided by ecosystems, like trees converting CO2 to O2?
  • What defines a biome?
  • Which of the following represents a characteristic of aesthetic value?
  • What role do feedback mechanisms play in the Gaia hypothesis?
  • What does succession refer to in an ecological context?
  • Intensive farming is defined by which of the following?
  • What does a buffer zone refer to in environmental protection?
  • Biodiversity refers to what aspect of ecosystems?
  • Which of the following is NOT a component of biodiversity?
  • What is a disadvantage of the pyramid of numbers?
  • Which of the following aspects does the Demographic Transition Model NOT focus on?
  • Which concept defines development that meets current needs without compromising future generations?
  • Which aspect does an ecological footprint take into account?
  • What is essential for living species and ecosystems to maintain productivity?
  • What role do invertebrates, often categorized as detritivores, play in the ecosystem?
  • Which type of value is not typically associated with a formal market price?
  • What do eluvial layers primarily lose?
  • What does aquaculture primarily involve?
  • What does the Demographic Transition Model primarily describe?
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