AP Environmental Science Practice
AP Environmental Science is an interdisciplinary course that explores concepts from geology, biology, chemistry, geography, and environmental studies. Students examine both natural processes and human-driven environmental challenges. Start your exam prep now with our free APES practice tests.
Free AP Environmental Science Practice Tests
Unit 1:
Ecosystems
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Unit 2:
Biodiversity
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Unit 3:
Populations
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Unit 4:
Earth Systems
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Unit 5:
Land & Water
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Unit 6:
Energy Resources
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Unit 7:
Air Pollution
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Unit 8:
Aquatic Pollution
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Unit 9:
Global Change
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Full-Length AP Environmental Science Exam
Section 1:
Multiple Choice
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Free Response
Question 1
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Free Response
Question 2
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Free Response
Question 3
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AP Environmental Science Overview
Section I: Multiple Choice
- 80 Questions
- 90 Minutes
- 60% of Total Exam Score
- Includes Individual Questions
- Includes Set-Based Questions
- Calculator Permitted
Free response
- 3 Questions
- 70 Minutes
- 40% of Total Exam Score
- Responses Must Be Written in Complete Sentences
- Answers Should Include Evidence or Reasoning
- Partial Credit Is Awarded for Correct Work
About the AP Environmental Science Test
The AP Environmental Science (APES) exam is a College Board assessment for students who have completed the AP Environmental Science course, which is designed to be equivalent to a one-semester introductory college-level environmental science class.
The course is interdisciplinary by nature, drawing on concepts from biology, chemistry, earth science, and social science to examine how natural systems work and how human activity affects them. It is well-suited for students interested in fields such as ecology, environmental engineering, marine biology, geology, geography, or public policy.
Exam Format
The exam is 2 hours and 40 minutes long and consists of two sections — multiple choice and free response — worth 60% and 40% of the overall score, respectively. It is a fully digital exam administered through the College Board’s Bluebook testing app, with all responses submitted automatically at the end of the exam. Calculators are permitted on both sections, and a reference sheet with equations and constants is provided.
Section I
Multiple Choice (80 questions | 90 minutes | 60% of score)
This section contains 80 questions, a mix of standalone items and sets of questions that refer to the same data presentation or visual. There is no penalty for wrong answers. Question sets fall into three categories:
- Quantitative Data Sets — 3–4 sets present data tables, charts, or graphs and primarily assess students’ ability to analyze and interpret numerical data.
- Qualitative Data Sets — 3–4 sets present models, visual representations, or maps and primarily assess students’ ability to interpret non-numerical information and make connections to environmental concepts.
- Text-Based Sources — 2 sets present written passages or excerpts that students must read and analyze in the context of environmental science concepts.
Section II
Free Response (3 questions | 70 minutes | 40% of score)
This section contains three free-response questions, each presenting an authentic environmental scenario. Responses must be written in complete sentences where explanation is required, and partial credit is available. The three questions are:
- Question 1: Design an Investigation — Students are presented with an environmental scenario accompanied by either a model/visual representation or quantitative data. They are asked to design or evaluate a scientific investigation, which may include identifying variables, describing controls, predicting outcomes, or outlining a procedure.
- Question 2: Analyze an Environmental Problem and Propose a Solution — Students examine an environmental problem drawn from real-world scenarios and propose a viable solution. Responses require students to explain the problem, connect it to relevant environmental concepts, and evaluate the feasibility or consequences of their proposed solution.
- Question 3: Analyze an Environmental Problem and Propose a Solution with Calculations — Similar in structure to Question 2, but this question also requires students to perform mathematical calculations as part of their analysis. Students must show their work clearly and use appropriate units, as partial credit may be awarded for correct reasoning even if the final answer is incorrect.
Scoring
Scores range from 1 to 5. Many colleges award credit or advanced placement for scores of 3 or higher, though policies vary by institution. APES has a reputation as a moderately difficult AP exam — it is considered accessible compared to other AP sciences, but it demands strong vocabulary knowledge, data interpretation skills, and the ability to apply concepts to novel real-world scenarios. Scores are typically released in July following the May exam.
Content & Big Ideas
The course is organized around four overarching Big Ideas that thread through all nine course units:
- Energy Transfer — Energy can be converted from one form to another and drives all ecological processes.
- Interactions Between Earth Systems — Earth’s systems interact in ways that produce and shape ecosystems.
- Interactions Between Different Species and the Environment — The health of a species is closely tied to its ecosystem, and minor environmental changes can have significant impacts.
- Sustainability — Human activities have physical, chemical, and biological consequences, and sustainable solutions are needed to balance resource use with environmental health.
These Big Ideas are explored across nine course units, which are weighted as follows on the multiple-choice section:
| Unit | Topic | Exam Weight |
| 1 | The Living World: Ecosystems | 6–8% |
| 2 | The Living World: Biodiversity | 6–8% |
| 3 | Populations | 10–15% |
| 4 | Earth Systems and Resources | 10–15% |
| 5 | Land and Water Use | 10–15% |
| 6 | Energy Resources and Consumption | 10–15% |
| 7 | Atmospheric Pollution | 7–10% |
| 8 | Aquatic and Terrestrial Pollution | 7–10% |
| 9 | Global Change | 15–20% |
Lab & Fieldwork Component
At least 25% of instructional time must be devoted to hands-on, inquiry-based laboratory investigations and/or fieldwork. Students gather and analyze real-world data, conduct field studies, and write reports that include methods, findings, and conclusions.