AP Environmental Science FRQ Room

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AP Environmental Science Free Response Questions

The best way to get better at FRQs is practice. Browse through dozens of practice AP Environmental Science FRQs to get ready for the big day.

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  • Unit 1: The Living World: Ecosystems (21)
  • Unit 2: The Living World: Biodiversity (23)
  • Unit 3: Populations (21)
  • Unit 4: Earth Systems and Resources (23)
  • Unit 5: Land and Water Use (26)
  • Unit 6: Energy Resources and Consumption (23)
  • Unit 7: Atmospheric Pollution (58)
  • Unit 8: Aquatic and Terrestrial Pollution (18)
  • Unit 9: Global Change (37)
Unit 1: The Living World: Ecosystems

Altered Nitrogen Cycle in Agricultural Landscapes

In an agricultural region with heavy use of nitrogen fertilizers, a study recorded rising soil nitra

Medium

Comparative Analysis of Coral Reef and Tropical Rainforest Ecosystems

Coral reefs and tropical rainforests are both highly productive but differ greatly in structure and

Medium

Comparative Terrestrial Biomes

A geographical region contains three distinct biomes: a Desert, a Temperate Deciduous Forest, and a

Hard

Ecological Interactions and Competition

This question examines species interactions, focusing specifically on competition within ecological

Medium

Ecosystem Response to Limiting Factors

A researcher is investigating the effect of nitrate concentration on the growth rate of a particular

Medium

Effect of Temperature on Decomposition Rate

Decomposition rate in soils can be modeled using an Arrhenius equation: $$k(T) = A*e^{-\frac{E}{R*T}

Hard

Food Web and Energy Flow Dynamics in Coral Reef Ecosystems

A study claims that coral reef ecosystems exhibit an inverted biomass pyramid due to the prolonged l

Hard

Hydrologic Cycle Disruption through Groundwater Depletion

A recent report asserts that intensive agricultural pumping has resulted in a significant drop in gr

Medium

Impact of Invasive Species on Aquatic Ecosystems

An invasive aquatic species has rapidly spread in a lake, disrupting native food webs and leading to

Hard

Impact of Invasive Species on Native Ecosystem Populations

The introduction of an invasive species can have dramatic effects on native species populations. Use

Hard

Impact of Invasive Species on Native Plant Communities

A researcher sets up controlled field plots to study the impact of an invasive plant species on nati

Medium

Light Attenuation in Aquatic Ecosystems

Light intensity in a lake decreases exponentially with depth, following the equation $$I(z) = I_{0}*

Medium

Modeling Groundwater Depletion Impact

Propose an experimental or data analysis study to examine the effects of groundwater extraction on a

Medium

Phosphorus Cycle and Ecosystem Limitation

Examine the phosphorus cycle and discuss its significance as a limiting nutrient in many ecosystems.

Medium

Predator-Prey Dynamics and Population Cycles

A long-term ecological study in a freshwater lake has produced a graph that illustrates the cyclic r

Hard

Primary Productivity and Photosynthesis Experiment

Investigate the factors affecting primary productivity in aquatic ecosystems and propose an experime

Hard

River Nutrient Dynamics and Riparian Vegetation

A study along a river examined how varying nutrient concentrations from agricultural runoff impact t

Medium

Temperature Effects on Soil Respiration

A researcher is studying how soil respiration (the production of CO₂ through microbial decomposition

Medium

Trophic Cascades and Food Web Dynamics

In a forest ecosystem, a sudden change in the population of a keystone predator has been observed. T

Hard

Understanding Global Ocean Circulation

Thermohaline circulation plays a crucial role in regulating global climate by driving deep-water cur

Extreme

Water Table Decline Due to Groundwater Extraction

A region's aquifer is being pumped at a rate of 5000 m³/day, while the natural recharge rate is only

Hard
Unit 2: The Living World: Biodiversity

Adaptations: Behavioral, Physiological, and Structural

Organisms exhibit various types of adaptations to survive in their environments. Analyze these adapt

Easy

Adaptations: Behavioral, Physiological, and Structural

Adaptations enable organisms to survive in challenging environments. Answer the following:

Easy

Analyzing Population Bottlenecks on Genetic Variability

Population bottlenecks can drastically reduce genetic variability and threaten long-term species via

Hard

Climate Change Effects on Adaptations and Biodiversity

Global warming is impacting adaptation strategies and biodiversity in coastal ecosystems. Using conc

Extreme

Ecological Succession in a Disturbed Ecosystem

Following a major disturbance, an ecosystem undergoes successional changes. Analyze the progression

Hard

Ecological Succession Stages Analysis

Ecological succession involves changes in species composition over time. Analyze the characteristics

Medium

Ecosystem Services Evaluation

This question examines the interconnectedness of various ecosystem services and the consequences of

Hard

Ecosystem Services in Agricultural vs. Urban Systems

Land-use changes, such as converting agricultural lands to urban areas, affect ecosystem services. C

Hard

Ecosystem Services: Provisioning and Regulating Benefits

Explore the different ecosystem services provided by healthy ecosystems and discuss their socio-econ

Easy

FRQ 9: Wildlife Migrations and Environmental Stressors

A researcher studies the migration patterns of amphibian species in response to environmental stress

Medium

FRQ 20: Predicting Future Trends in Biodiversity – A Modeling Approach

A researcher employs computational models to predict future trends in biodiversity under varying env

Extreme

Impact of Road Networks on Bird Migration Patterns

Scientists conducted a field study to track migratory birds along routes intersected by road network

Hard

Indicator Species as Environmental Monitors

Indicator species provide early signs of environmental changes. Discuss their role and give examples

Easy

Investigating Pesticide Effects on Non-target Species and Pollination Services

Pesticide use can negatively impact non-target species and reduce ecosystem services like pollinatio

Hard

Investigating the Impact of Habitat Fragmentation on Biodiversity

Many ecosystems are increasingly subjected to habitat fragmentation, which may significantly reduce

Medium

Modeling Immigration and Extinction on Islands

This FRQ applies the theory of island biogeography to a mathematical model examining immigration and

Extreme

Overfishing and Trophic Cascades

Overfishing disrupts marine ecosystems by reducing the biomass of key species. The logistic growth m

Medium

Population Bottlenecks and Genetic Diversity

A population undergoes a severe bottleneck due to a catastrophic event. Discuss the genetic conseque

Medium

Predicting Ecosystem Recovery Post-Disturbance

Ecosystem recovery following a natural disturbance involves changes in net primary productivity (NPP

Hard

Regulating Ecosystem Services and Agricultural Systems

This FRQ addresses how regulating ecosystem services, such as natural pest control, influence agricu

Medium

Short-Term vs. Long-Term Adaptations

Organisms exhibit both short-term and long-term adaptations to environmental changes. Contrast these

Medium

Species-Area Relationship Analysis

A biologist is studying the relationship between forest fragment area and species richness. The rela

Medium

Water Pollution and Aquatic Biodiversity

Nutrient loading from human activities can lead to water pollution, affecting aquatic biodiversity.

Medium
Unit 3: Populations

Assessing Population Growth under Water Stress

A biologist is investigating how water availability affects the exponential growth of an amphibian p

Medium

Biotic Potential and Environmental Resistance

Investigate the interplay between biotic potential and environmental resistance in determining popul

Easy

Carrying Capacity and Environmental Limits

Examine the concept of carrying capacity and analyze the factors that regulate population size. Use

Medium

Comparing Adaptability: Generalist vs Specialist Species

A researcher is interested in assessing the adaptability of a generalist species versus a specialist

Medium

Demographic Transition Model Analysis

Evaluate the stages of demographic transition using data on birth and death rates, and discuss the s

Hard

Designing Sustainable Management Strategies Based on Carrying Capacity

Develop a sustainable wildlife management plan for a hypothetical reserve by applying the concept of

Extreme

Evaluating Experimental Designs in Population Dynamics

Critically evaluate an experimental study design that measures population growth in response to vary

Extreme

Feedback Loops in Population Regulation

Explain the roles of positive and negative feedback loops in regulating population sizes in ecologic

Medium

FRQ 4: Carrying Capacity and Environmental Regulation

This question investigates the concept of carrying capacity (K) and involves analyzing population fl

Hard

FRQ 5: Interpreting Population Growth Curves: J-Curve Versus S-Curve

A study displays two distinct population growth curves for separate communities. One curve has a ste

Hard

FRQ 5: Population Doubling Time Using the Rule of 70

This question requires you to apply the Rule of 70 to determine population doubling time and to disc

Extreme

FRQ 8: Population Dispersal Patterns in Ecology

This question asks you to distinguish between different dispersal patterns in populations and then a

Easy

FRQ 11: Assessing Feedback Loops in Ecosystem Population Regulation

Scientists studied predator–prey dynamics in a controlled ecosystem and recorded percentage changes

Hard

FRQ 11: Interpretation of Age-Structure Diagrams

This question focuses on age-structure diagrams and their implications for population dynamics.

Medium

Impact of Biodiversity Loss in Changing Environments

Biodiversity is critical for ecosystem stability. Investigate how the loss of specific species can a

Medium

Interpreting Age-Structure Diagrams

You are provided with age-structure diagrams representing pyramid-shaped, bell-shaped, and urn-shape

Medium

Interpreting Survivorship Curves

Examine the attached graph depicting survivorship curves and interpret the implications for populati

Medium

Interpreting Survivorship Curves

Examine the survivorship curves in the provided graph and discuss their implications for species' re

Medium

Liebig’s Law of the Minimum and Limiting Factors

Using the provided nutrient data, explain how Liebig's Law of the Minimum determines plant growth.

Medium

Population Density and Environmental Impact Calculation

Population density is an important indicator of potential environmental stress. Answer the following

Easy

Urbanization Effects on Population Dynamics and Resources

Evaluate the impact of urbanization on population dynamics and resource availability, and propose su

Hard
Unit 4: Earth Systems and Resources

Air Pollution and Respiratory Health Data Chart Analysis

Examine the provided table correlating air pollutant levels with incidents of respiratory health iss

Hard

Assessing Plant Species Response to Simulated Temperature Increases

Design an experimental study to investigate how increasing ambient temperatures, simulating climate

Extreme

Assessing the Impacts of ENSO on Marine Biodiversity

The table below summarizes data collected during an El Niño event regarding sea surface temperature

Extreme

Assessing Watershed Pollution Trends

This question examines the impact of agricultural runoff on watershed water quality over time using

Medium

Climate Change Emissions and Temperature Trends Graph Assessment

Using the provided graph that shows greenhouse gas emissions and global temperature anomalies over s

Extreme

Comparative Analysis of Rock Types and Erosion Susceptibility

The table below compares different rock types based on their resistance to weathering and associated

Hard

Effect of Atmospheric CO2 on Plant Photosynthesis

Design an experimental study to investigate how varying atmospheric CO2 concentrations affect the ra

Medium

Effect of Sunlight Angle on Surface Temperature Distribution

Develop an experimental study using a solar simulator to investigate how the angle of incidence of s

Medium

Evaluating Land Use Impacts on Water Quality in a Watershed

A study of a watershed yields the following data regarding phosphorus levels in different sections c

Extreme

FRQ 11: Watershed Nutrient Run-Off Experiment

In efforts to assess the impact of agricultural practices on watershed nutrient run-off, researchers

Hard

FRQ 18: Soil pH and Nitrogen Availability

An agronomist is studying how soil pH affects the availability of nitrogen for plant uptake. Soil sa

Medium

Global Wind Patterns and the Coriolis Effect

The Coriolis Effect plays a crucial role in determining global wind patterns. Analyze its influence

Hard

Hurricane Energy: Estimating Latent Heat Release

Hurricanes release a tremendous amount of energy primarily through the condensation of water vapor.

Hard

Impact of El Niño on Regional Climate and Ecology

This question explores the climatic and ecological effects of the El Niño Southern Oscillation (ENSO

Hard

Impact of Mountain Ranges on Local Climates: The Rain Shadow Effect

This question investigates how mountain ranges influence local climates through the rain shadow effe

Medium

Impacts of Glaciation on Soil Formation

The table below compares soil characteristics in glaciated versus non-glaciated regions: | Region T

Hard

Influence of Soil Texture on Water Infiltration and Nutrient Loss

Soil texture significantly affects water infiltration and nutrient leaching. Examine the relationshi

Medium

Interconnected Environmental Systems: Plate Tectonics, Soil Formation, and Climate Change

Discuss how the interactions among plate tectonics, soil formation, and climate change affect ecosys

Extreme

La Niña and Hurricane Activity

It has been claimed that La Niña conditions inevitably lead to an increase in Atlantic hurricane act

Hard

Monsoons and Regional Climate Variability

Monsoons drive seasonal weather changes and directly affect regional agriculture and water availabil

Hard

Soil Formation and Erosion Processes

Design an experimental study to investigate the factors influencing soil formation and erosion, and

Hard

Transform Boundaries and Earthquake Prediction

A seismologist is studying transform plate boundaries and their association with earthquake generati

Extreme

Watershed Nutrient Runoff Experiment

A watershed manager designed an experiment to measure nutrient runoff, specifically nitrate and phos

Medium
Unit 5: Land and Water Use

Agricultural Revolutions: Yield Comparison

Use the provided data table to compare agricultural yields from the First, Second, and Third Agricul

Medium

Clear‐Cutting and Edge Effect Schematic Analysis

Examine the schematic diagram that illustrates the process of clear‐cutting and its associated edge

Medium

Deforestation and Carbon Emissions

A tropical country is experiencing rapid deforestation for urban development and agriculture, contri

Hard

Environmental Impacts of Concentrated Animal Feeding Operations (CAFOs)

Studies claim that CAFOs contribute significantly to water pollution through nutrient runoff. Evalua

Medium

Evaluating the Role of Urban Greening in Mitigating the Urban Heat Island Effect

Design an experiment to assess whether urban greening (e.g., parks, green roofs) can mitigate the ur

Medium

Experiment Analysis: GMO vs. Non-GMO Crop Yield Comparison

In a study comparing the yields of GMO and non-GMO corn varieties over a full growing season, resear

Medium

Green Revolution: Impact of GMO Adoption on Crop Production

A farm using traditional seeds produces 100 tons of crop. After adopting genetically modified (GMO)

Easy

Impact of Road Building on Forest Fragmentation

Assess how road building affects forest fragment sizes and discuss potential measures to mitigate th

Hard

Investigating Nutrient Runoff from CAFO Operations into Waterways

Design an experiment to investigate nutrient (nitrate) runoff from Concentrated Animal Feeding Opera

Hard

Investigating Overfishing Effects on Marine Ecosystems

A marine ecologist sets up an experimental tank simulating a small marine ecosystem. Different secti

Hard

Mining and Soil Erosion

An open-pit mining operation in a mountainous region has led to increased soil erosion due to the re

Extreme

Mining Methods and Environmental Consequences

Evaluate various mining techniques and analyze their environmental impacts with a focus on remediati

Extreme

No-Till vs Conventional Tillage: Effect on Soil Erosion

Design an experiment to compare the effect of no-till and conventional tillage practices on soil ero

Medium

Overfishing, Aquaculture, and Fisheries Management

Analyze the issues surrounding overfishing and examine the potential role of aquaculture in sustaini

Hard

Pollution from Agricultural Pesticides: A Case Study

Recent data from a midwestern farm indicate that persistent agricultural pesticides are being detect

Medium

Renewable Energy Adoption in Urban Settings

This question evaluates the adoption of renewable energy technologies in urban environments by analy

Easy

Soil Erosion Process Diagram Analysis

Evaluate the provided schematic diagram that represents soil erosion mechanisms under various agricu

Medium

Sustainable Agriculture: No-Till and Crop Rotation Benefits

A farming community has recently transitioned from conventional tillage methods to sustainable pract

Easy

Synthetic vs. Organic Fertilizers Trade-offs

Evaluate the trade-offs between using synthetic and organic fertilizers in terms of crop yield impro

Medium

The Impact of Invasive Species on Biodiversity

An invasive plant species has recently been introduced into a native grassland ecosystem, where it i

Medium

Tragedy of the Commons: Visual Analysis

Examine the provided diagram representing the Tragedy of the Commons. The diagram depicts how multip

Medium

Transitioning Toward Renewable Energy for Sustainability

Examine the relationship between energy resource consumption and sustainability, and propose a trans

Extreme

Urban Sprawl and Land Use Conversion

Assess the impact of urban expansion on agricultural land through quantitative and qualitative analy

Easy

Urbanization and Its Environmental Trade-offs

Examine the benefits and drawbacks of urbanization, focusing on urban runoff and water quality.

Medium

Water Quality Impact from CAFOs

The table displays water quality measures (specifically soluble nitrogen and phosphorus levels) at l

Medium

Water Quality Impacts of CAFOs

A researcher analyzes the effects of Concentrated Animal Feeding Operations (CAFOs) on downstream wa

Hard
Unit 6: Energy Resources and Consumption

Analysis of Clean Coal Technology

The table below compares emission levels for conventional coal combustion versus clean coal processe

Medium

Biomass Energy and Anaerobic Digestion

Investigate the process of generating energy from biomass via anaerobic digestion and examine its en

Medium

Biomass Energy Conversion Process

Study the flowchart outlining the biomass energy conversion process. Answer the following:

Medium

Cogeneration System Efficiency Experiment

Design an experiment to investigate how a cogeneration system's simultaneous production of electrici

Medium

Combustion Efficiency and Emission Analysis

A power plant burns fossil fuels following the reaction $$C + O_2 \rightarrow CO_2$$. The table belo

Hard

Comparative Analysis of Renewable and Nonrenewable Energy Resources

Renewable energy resources are naturally replenished on a human time scale, unlike nonrenewable reso

Medium

Energy Conversion Efficiency in Power Plants

This question requires you to analyze energy conversion from thermal to electrical energy in power p

Extreme

Energy Unit Conversion Calculations

In a lab, energy values must be converted between different units. Given that $$1 \text{ HP} = 746 \

Easy

Environmental Impacts of Hydraulic Fracturing

Assess the environmental impacts of hydraulic fracturing (fracking) in fossil fuel extraction and pr

Medium

Evaluation of Energy Policy and Sustainability

A regional council is evaluating its energy sources. The table below summarizes energy production fr

Extreme

Fossil Fuel Market Dynamics

This question focuses on the application of economic principles to fossil fuel markets, including su

Medium

Fossil Fuel Power Plant Efficiency Calculation

A coal-fired power plant burns 500 tonnes of coal per day. Each kilogram of coal provides 30 MJ of t

Medium

Geothermal Energy and Heat Extraction

Geothermal energy is harnessed from the Earth’s internal heat. Evaluate the methods used for energy

Hard

Hydroelectric Dams: Benefits and Drawbacks

Hydroelectric dams have long been a major source of renewable energy. Analyze the benefits and envir

Medium

Hydroelectric Dams: Energy Calculation and Ecological Impact

This question explores the energy potential of hydroelectric dams and the associated ecological trad

Medium

Hydrogen Fuel Cells Efficiency

Hydrogen fuel cells are considered a promising technology for clean energy production. Examine their

Hard

Interdisciplinary Analysis of Energy Policy and Environmental Impact

Energy policy decisions must consider economic, social, and environmental impacts. Analyze how these

Extreme

Life Cycle Analysis of Energy Sources

Perform a life cycle analysis comparing fossil fuels with a renewable energy source of your choice t

Hard

Long-Term Energy Resource Sustainability Model Experiment

A comprehensive computer simulation evaluates the long-term sustainability of various energy resourc

Extreme

Residential Photovoltaic System Energy Output

A residential photovoltaic system has a peak capacity of 5 kW. Due to weather and orientation, it op

Medium

Solar Energy System Analysis

A residential photovoltaic system converts solar energy into electrical energy. A table below shows

Easy

Solar Panel Efficiency Experiment Analysis

In an experiment to evaluate solar panel efficiency, a group of students sets up a solar panel on a

Medium

Supply and Demand Dynamics in Fossil Fuel Markets

Study the graph depicting fossil fuel market dynamics. Answer the following:

Medium
Unit 7: Atmospheric Pollution

Acid Deposition and Ecosystem Impacts

Acid deposition, commonly known as acid rain, results from atmospheric chemical reactions and has pr

Hard

Acid Rain and Ecosystem Impact Assessment

Acid rain has deleterious effects on ecosystems. Evaluate the impact using the provided data and you

Hard

Acid Rain Remediation Strategies

Acid rain results from atmospheric reactions that produce sulfuric and nitric acids, which in turn c

Hard

Air Pollutants: Industrial Smog and Particulate Matter

Examine the formation process of industrial smog and the behavior of particulate matter in the atmos

Medium

Air Pollution Sources and Effects

This question explores the definitions and differences between various sources and types of air poll

Easy

Air Pollution: Types and Sources

Examine the differences between primary and secondary air pollutants, and between point and non-poin

Easy

Analyzing Photochemical Smog Formation

In an urban area, photochemical smog exhibits a distinct daily cycle. During early morning hours (6

Hard

Assessing Effectiveness of Government Policies on Air Quality Improvement

A retrospective study evaluated air quality data collected over a 10-year period before and after th

Medium

Assessing Health Risks from Heavy Metal Air Pollutants

Heavy metals like lead (Pb) in the atmosphere can pose significant health risks. Consider the follow

Hard

Assessing Industrial Lead Emissions in a Simulated Furnace

In a laboratory simulation of industrial lead emissions, a researcher used a controlled furnace to v

Hard

Assessing Vehicle Emissions During Peak Traffic

Design an experimental study to quantify the contribution of vehicle emissions to urban air pollutan

Hard

Assessment of Particulate Matter Settling Rate in Simulated Atmosphere

In this experiment, a researcher studies the settling of particulate matter by releasing artificiall

Medium

Atmospheric CO₂ and Particulates Monitoring Data Interpretation

A study monitored atmospheric CO₂ and particulate matter (PM) levels over a 30-day period in an indu

Medium

Comparative Study of Natural vs. Anthropogenic PMx Sources

Design an experiment to compare the concentrations of naturally occurring particulate matter (PMx) v

Hard

Data Analysis on Air Pollutant Trends Over Time

Scientists have collected continuous data over a 24‐hour period for three key air pollutants: carbon

Extreme

Efficacy of Pollution-Control Devices

Devise an experimental procedure to test the efficacy of various pollution-control devices (e.g., sc

Medium

Evaluating Air Pollution Control Technology: Catalytic Converters

Catalytic converters are used to reduce harmful emissions from internal combustion engines. A study

Medium

Evaluating Chemical Reactions in Catalytic Converters

Catalytic converters facilitate several chemical reactions to reduce vehicle emissions. Answer the q

Hard

Examining the Relationship between Fossil Fuel Combustion and Acid Deposition

A study investigated the link between fossil fuel combustion and acid deposition. The table below pr

Medium

Formation of Industrial Smog: Sulfur Dynamics Experiment

In this experiment, a researcher simulates the formation of industrial smog by burning a controlled

Medium

Ground-Level Ozone Formation and Health Effects

An urban research study focuses on ground-level ozone formation and its impact on public health. The

Medium

Impact Assessment of Catalytic Converters on Vehicle Emissions

Catalytic converters can greatly reduce harmful vehicle emissions. Use the table below to analyze th

Easy

Impact of Renewable Energy Adoption on CO2 Emissions

A researcher assesses the impact of renewable energy integration on fossil fuel CO2 emissions in a r

Medium

Impacts of Indoor Air Pollutants

Indoor air pollutants can have significant health effects. Discuss the health impacts of three indoo

Medium

Indoor Air Pollutants and Remediation Strategies

Indoor air quality is a major environmental concern affecting human health. Using the provided table

Easy

Industrial Smog and Soot Formation

A study analyzed emissions from several industrial sites to understand the formation of industrial s

Hard

Investigating the Relation between Industrial Emissions and Particulate Matter

A monitoring study was conducted at various power plants to assess particulate matter (PMₓ) emission

Easy

Lead Exposure and Public Health Implications

Urban areas often face challenges with lead contamination due to industrial activities, lead-acid ba

Medium

Lead Pollution Sources and Health Effects

Lead pollution poses serious health risks. Using the provided table, analyze the principal sources o

Easy

Mechanisms of Ozone as a Secondary Pollutant

Tropospheric ozone is a secondary pollutant formed by the reaction of nitrogen oxides (NOₓ) with vol

Hard

Nitrogen Oxides and Soil Nutrient Imbalance

Nitrogen oxides (NOₓ) contribute to atmospheric and soil changes. Evaluate their role in altering so

Medium

Nitrogen Oxides Reaction Lab: Formation of Tropospheric Ozone

In a controlled laboratory, a researcher uses UV lamps to simulate the conversion of nitric oxide (N

Hard

Peroxyacyl Nitrates (PANs) and Their Environmental Implications

In a heavily industrialized urban area, elevated levels of peroxyacyl nitrates (PANs) have been dete

Hard

Peroxyacyl Nitrates (PANs) and Urban Air Quality

PANs are secondary pollutants that can travel far from their urban origins. Use the provided data to

Medium

Photocatalytic Reactions in Atmospheric Pollution

Design an experimental study to investigate the role of photocatalytic reactions in forming secondar

Extreme

Photochemical Reactions and Secondary Pollutants Formation

A chemist is investigating the formation of peroxyacyl nitrates (PANs), a secondary pollutant, which

Extreme

Photochemical Smog Formation Dynamics

A graph displays the formation of photochemical smog by tracking NO2 and O3 concentrations over the

Medium

Photochemical Smog: Comprehensive Analysis

This question examines the formation, trends, and mitigation of photochemical smog.

Hard

Photochemical Smog: Daily Trends and Implications

Photochemical smog is generated by reactions involving nitrogen oxides (NOₓ) and volatile organic co

Medium

Photochemical Smog: Formation, Components, and Timing

A city's environmental department is studying photochemical smog to better understand its formation

Hard

Primary vs. Secondary Pollutants Analysis

A mid-sized city is experiencing both visible smog and ground-level ozone formation. An emissions in

Medium

Sick Building Syndrome: Indoor Air Quality Analysis

This question targets 'sick building syndrome' (SBS) by examining indoor air quality issues, specifi

Medium

Sulfur Dioxide and Acid Deposition

A research group measured sulfur dioxide (SO2) levels at various distances from an industrial plant

Medium

Sulfur Dioxide and Acid Rain Formation

Sulfur dioxide (SO₂) emissions can lead to acid rain formation through a series of reactions. Answer

Medium

Sulfur Dioxide Emissions and Acid Rain Formation

A region with several coal-fired power plants has been experiencing acid rain, which is damaging loc

Hard

Sulfur Dioxide: Emissions and Air Quality Control

Sulfur dioxide (SO₂) is a major atmospheric pollutant from fossil fuel combustion. Answer the follow

Hard

Suspended Particulate Matter Analysis

This question examines the characteristics, sources, and mitigation strategies of suspended particul

Medium

Thermal Inversion Effects on Pollutant Trapping Experiment

In this study, a researcher simulates a thermal inversion by cooling the air at the bottom of a tall

Hard

Thermal Inversions and Air Pollution Concentration

Thermal inversions can significantly alter the distribution of air pollutants. Analyze how a thermal

Hard

Thermal Inversions and Air Pollution Trapping

A researcher studies the effects of thermal inversions on pollutant distribution in an urban environ

Hard

Thermal Inversions and Air Quality

This question investigates the impact of thermal inversions on air pollution dispersion and analyzes

Medium

Urban Heat Islands and Air Pollutant Concentrations

Urban heat islands (UHIs) can influence air quality. Consider the following data, which shows urban

Hard

Urban Heat Islands and Air Pollution Dynamics

Evaluate the interplay between urban heat islands and air pollution levels.

Medium

Urban Heat Islands and Air Pollution Interaction

This question explores the concept of urban heat islands and their impact on air pollution, requirin

Extreme

Urban Heat Islands and their Impact on Air Chemistry

A researcher examines the impact of urban heat islands on air pollution and associated atmospheric c

Medium

VOCs and the Formation of Photochemical Smog

Volatile organic compounds (VOCs) contribute significantly to the formation of photochemical smog. I

Medium

Volcanic Organic Compounds (VOCs) and Air Quality

Analyze the characteristics of volcanic organic compounds and compare them with industrial VOCs in t

Medium

Volcanic Organic Compounds and Indoor Air Quality

Investigate the characteristics of volcanic organic compounds (VOCs) and their impact on indoor air

Medium
Unit 8: Aquatic and Terrestrial Pollution

Anaerobic Digestion and Renewable Energy Recovery

Anaerobic digestion is a waste treatment process that also produces renewable energy. Analyze biogas

Hard

Analysis of Anaerobic Digestion for Waste Treatment

A city is considering anaerobic digestion as a method to treat its organic waste. A simplified diagr

Hard

Biological Oxygen Demand (BOD) Analysis Accuracy

A researcher collected water samples from a municipal wastewater treatment plant to measure Biologic

Easy

Chemical Analysis of Oil Spills

Examine the environmental impacts of oil spills by analyzing data related to oil concentration and s

Medium

Comparative Analysis of Drinking Water Treatment Technologies

A water treatment facility is evaluating several technologies for drinking water purification. The f

Hard

Comparing Water Testing Methods

This FRQ examines your ability to synthesize water testing data to evaluate water quality. Interpret

Medium

Effects of Oil Spills on Marine Life

A coastal study monitored the concentration of oil in seawater and the mortality rate of seabirds ov

Medium

Evaluating the Efficiency of Ion Exchange Columns in Wastewater Treatment

A researcher designed an experiment to test the efficiency of an ion exchange column in removing hea

Medium

FRQ15: Urban Stormwater and Pollutant Transport

Analyze the data from various storm events to understand urban stormwater pollutant transport. Use t

Medium

Human Impacts on Wetlands and Mangroves

This question investigates the ecological importance of wetlands and mangroves, and the effects of h

Medium

Impact of Wastewater Treatment Upgrades

This FRQ examines the benefits of upgrading wastewater treatment processes to better remove nutrient

Medium

Impacts of Oil Spills on Marine Ecosystems

This FRQ examines the environmental consequences of oil spills on marine ecosystems, focusing on eco

Medium

Investigating the Role of Microorganisms in Degrading Pollutants Through Bioremediation

An experiment is conducted in which a known pollutant is introduced into contaminated water, and the

Hard

Modeling the Long-Term Impacts of Diverse Waste Disposal Practices on Ecosystem Health

Different waste disposal methods, such as incineration, landfilling, and ocean dumping, have varying

Extreme

Urban Development and Biodiversity Loss in Wetland Ecosystems

Assess the impact of urban development on wetland biodiversity by analyzing changes in species richn

Extreme

Water Quality Testing and Experimental Design

Evaluate water quality data and design a controlled experiment to test the impact of a specific vari

Medium

Water Quality Testing: Analyzing Data from Multiple Locations

Environmental scientists conducted water quality tests at three different sample sites (A, B, and C)

Medium

Water Quality Testing: Field Assessment

A local environmental agency conducted field tests on a nearby lake to assess its water quality. The

Medium
Unit 9: Global Change

Assessing the Effects of Invasive Species on Ecosystem Services

This question explores how invasive species impact ecosystem services and requires you to design a f

Hard

Biodiversity Loss: Invasive Species Impact on Ecosystems

This question deals with the impact invasive species can have on native biodiversity and ecosystem s

Hard

Comparative Analysis of Energy Sources

Using comparative data, analyze the trade-offs between fossil fuel and renewable energy sources in t

Medium

Deforestation and Climate Change Feedbacks

Assess the role of deforestation in the increase of atmospheric \(CO_2\) levels and its implications

Hard

Deforestation and its Impact on Carbon Dioxide Levels

This question examines the relationship between deforestation and increases in atmospheric CO2 level

Hard

Designing an Experiment: Measuring the Rate of Ozone Repair in the Stratosphere

Ozone in the stratosphere is constantly being formed and repair mechanisms are in place. In this que

Hard

Endangered Species Conservation Strategies

Many species are now classified as endangered due to various human-induced pressures. Evaluate conse

Easy

Energy Production and Greenhouse Gas Emissions

Discuss how different methods of energy production contribute to greenhouse gas emissions and propos

Medium

Evaluating Genetic Diversity Loss in Small Populations

Examine how small population sizes in endangered species lead to a loss of genetic diversity and dis

Medium

Evaluating Legal and Economic Strategies to Reduce Ozone-Depleting Substances

In an effort to protect the ozone layer, a policymaker reviews strategies such as legislation, tarif

Hard

Evaluating the Greenhouse Effect: Laboratory and Field Approaches

This question focuses on the greenhouse effect, its underlying processes, and experimental methods t

Hard

Experimental Design: Impact of Legislative Policies on Environmental Chemical Controls

International environmental policies have played a significant role in reducing the release of ozone

Extreme

Experimental Evaluation of International Protocols on Climate Change Mitigation

International agreements play a crucial role in climate change mitigation. This question involves in

Extreme

Glacial Melt Simulation and Freshwater Input Experiment

A researcher simulates the impact of glacial melt on coastal salinity by placing blocks of frozen fr

Hard

Global Policies on Ozone and Climate Change

This question requires you to compare international policies addressing ozone depletion and climate

Hard

Global Sea Level Rise and Its Consequences

Sea level rise is one of the measurable impacts of global climate change. This question uses simple

Easy

Health Impacts of Ozone Depletion

This question looks at the health implications of ozone depletion due to increased UV exposure.

Medium

Human Health Impacts of UV Radiation Exposure

Analyze the potential health effects of increased ultraviolet radiation due to ozone depletion.

Medium

Impact of Increasing Greenhouse Gases on Global Temperature

Many climate models relate global temperature change to the concentration of CO₂. Consider the logar

Medium

Impacts of Invasive Species on Ecosystems

This question focuses on the characteristics of invasive species, their population dynamics, and the

Medium

Integrated Analysis of Policies and Natural Phenomena in Climate Mitigation

Recent data indicates that global average temperatures have risen by approximately 1°C since 1880 an

Extreme

Interconnected Influences on Global Climate Change

This question requires a synthesis of multiple factors affecting global climate change and asks you

Extreme

Invasive Plant Competition in a Controlled Garden

A researcher examines the competitive interactions between an invasive plant species and a native pl

Easy

Invasive Species Monitoring: Data Interpretation

A study tracks the spread of European green crabs in a coastal region over 20 years. Use the data pr

Medium

Invasive Species: Impacts, Management, and Recovery

This question addresses the pathways of invasive species introduction, their impacts, and management

Medium

Investigating the Positive Feedback Loop in Arctic Methane Emissions

This question focuses on understanding positive feedback loops in the context of Arctic methane emis

Extreme

Maintaining Biodiversity: Keystone Species

This question addresses the concept of keystone species and their importance in maintaining ecosyste

Easy

Modeling Energy Transfer in Earth's Atmosphere

This question focuses on the modes of energy transfer in Earth’s atmosphere and requires you to perf

Extreme

Multiple Stressors and Ecosystem Resilience

An ecologist is investigating how multiple environmental stressors—such as invasive species, climate

Hard

Population Dynamics of Endangered Species

This problem examines the population decline of endangered species and uses exponential decay models

Medium

Positive Feedback Loops in Climate Change

Examine the concept of positive feedback loops within the context of global climate change and desig

Extreme

Quantifying Greenhouse Gas Emissions from Energy Production

This question examines the calculation of CO₂ emissions from a coal-fired power plant and involves a

Medium

Radiative Forcing by Black Carbon (Soot)

This question examines the concept of radiative forcing and requires you to calculate its value base

Medium

Stratospheric Ozone Depletion Analysis

This question addresses the formation of stratospheric ozone and its depletion by human-made chemica

Medium

Stratospheric Ozone Formation and Depletion Mechanisms

This question explores the formation and destruction of stratospheric ozone. Consider the photolysis

Medium

Synergistic Effects of Ozone Depletion and UV Radiation

Explore how the depletion of the ozone layer leads to increased UVB radiation at the Earth's surface

Hard

Urban versus Rural Greenhouse Gas Emissions

This question compares greenhouse gas emissions between urban and rural areas by examining per capit

Medium

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Where can I find practice free response questions for the AP Environmental Science exam?
The free response section of each AP exam varies slightly, so you’ll definitely want to practice that before stepping into that exam room. Here are some free places to find practice FRQs :
  • Of course, make sure to run through College Board's past FRQ questions!
  • Once you’re done with those go through all the questions in the AP Environmental ScienceFree Response Room. You can answer the question and have it grade you against the rubric so you know exactly where to improve.
  • Reddit it also a great place to find AP free response questions that other students may have access to.
How do I practice for AP AP Environmental Science Exam FRQs?
Once you’re done reviewing your study guides, find and bookmark all the free response questions you can find. The question above has some good places to look! while you’re going through them, simulate exam conditions by setting a timer that matches the time allowed on the actual exam. Time management is going to help you answer the FRQs on the real exam concisely when you’re in that time crunch.
What are some tips for AP Environmental Science free response questions?
Before you start writing out your response, take a few minutes to outline the key points you want to make sure to touch on. This may seem like a waste of time, but it’s very helpful in making sure your response effectively addresses all the parts of the question. Once you do your practice free response questions, compare them to scoring guidelines and sample responses to identify areas for improvement. When you do the free response practice on the AP Environmental Science Free Response Room, there’s an option to let it grade your response against the rubric and tell you exactly what you need to study more.
How do I answer AP Environmental Science free-response questions?
Answering AP Environmental Science free response questions the right way is all about practice! As you go through the AP AP Environmental Science Free Response Room, treat it like a real exam and approach it this way so you stay calm during the actual exam. When you first see the question, take some time to process exactly what it’s asking. Make sure to also read through all the sub-parts in the question and re-read the main prompt, making sure to circle and underline any key information. This will help you allocate your time properly and also make sure you are hitting all the parts of the question. Before you answer each question, note down the key points you want to hit and evidence you want to use (where applicable). Once you have the skeleton of your response, writing it out will be quick, plus you won’t make any silly mistake in a rush and forget something important.