AP Environmental Science
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ExploreAbout this exam
AP Environmental Science is a College Board Advanced Placement course and exam intended for high school students who have completed two years of laboratory science (life and physical) plus at least one year of algebra. It is equivalent to a one-semester introductory college environmental science course, and a qualifying score may earn college credit or placement, depending on the institution. The course treats Earth as a system of interdependent regional ecosystems and asks students to apply scientific tools to real problems: explaining environmental concepts and processes, analyzing data and visual representations, applying quantitative methods, proposing evidence-supported solutions, and identifying hypotheses in research studies. Content is organized into nine units, from ecosystems and biodiversity through populations, Earth systems, land and water use, energy, air pollution, aquatic and terrestrial pollution, and global change. The exam is fully digital, taken in the Bluebook app, with an 80-question multiple-choice section (1 hour 30 minutes, 60% of the score) and three free-response questions (1 hour 10 minutes, 40%). Calculators are permitted, and reference information is available only in Bluebook. Preparation should combine your AP classroom materials and practice with hands-on lab and field work, since data interpretation and calculation carry heavy weight.
What you'll study
About AP Environmental Science preparation
What is the format of the AP Environmental Science exam?
It is fully digital, completed in the Bluebook testing app, with responses submitted automatically at the end. Section I has 80 multiple-choice questions in 1 hour 30 minutes and counts for 60% of the score. Section II has 3 free-response questions in 1 hour 10 minutes and counts for 40%.
What do the three free-response questions ask me to do?
Question 1 asks you to design an investigation from a scenario with a model or visual representation. Question 2 asks you to analyze and interpret quantitative data in a table, chart, or graph. Question 3 asks you to analyze an environmental problem using calculations. All three require proposing solutions to environmental problems.
Can I use a calculator, and where is the reference information?
Yes, calculators are permitted on this exam; check the AP calculator policy for the list of allowed models. Reference information for AP Environmental Science is available only in Bluebook, and you can access it in test previews as well as on exam day, so practice finding it there beforehand.
What background do I need before taking the course?
The recommended prerequisites are two years of high school laboratory science, including life science and physical science, along with at least one year of algebra. The course is equivalent to a one-semester introductory college environmental science course, so the algebra matters for the calculation-based questions.
Which units carry the most weight on the exam?
Unit 9: Global Change is the heaviest at 15%-20% of the exam score. Units 3 through 6 (Populations, Earth Systems and Resources, Land and Water Use, and Energy Resources and Consumption) each count for 10%-15%. Units 1 and 2 are 6%-8% each, and Units 7 and 8 are 7%-10% each.
In what order should I study the units?
Following the published sequence works well because later units build on earlier ones, but the heaviest return comes from Units 9, 3, 4, 5, and 6, which together account for most of the exam. Whatever order you choose, practice the skills the exam rewards: explaining processes, reading data representations, calculating, and justifying solutions with evidence.
What are common ways students lose points?
Weak quantitative reasoning is the biggest risk, since data sets and calculation questions appear in both sections. Other frequent problems include describing a graph instead of interpreting it, proposing a solution without evidence, confusing similar cycles or pollutants, and failing to practice in Bluebook so time is lost navigating the digital interface.
How is the multiple-choice section structured beyond individual questions?
Alongside individual questions, Section I includes question sets. Three to five sets use quantitative data such as tables, charts, or graphs; three to five sets use qualitative data such as models, representations, or maps; and two sets use text-based sources. Each set type emphasizes a different science practice, so expect varied stimulus material.
Can I retake the exam, and when is it offered?
The AP Environmental Science exam is scheduled for Thursday, May 13, 2027, Session 2; your AP coordinator will confirm when and where you test. Retake and late-testing rules are set by the AP Program and your school, so ask your coordinator rather than assuming a second attempt is available.
Has the course or exam changed recently?
The Course and Exam Description was updated with minor clarifications for the 2026-27 school year, refining the wording of one learning objective, selected essential knowledge statements, exam information, and free-response questions. Course content itself will not change, so existing study materials remain broadly usable.