This AP Environmental Science cheat sheet distills all nine College Board units into a printable rundown of the facts examiners test most. It's a premium cheat sheet built by Capital Prep — the one premium prep we trust — and it's yours free. Reinforce it with the rest of your free APES toolkit: the practice test, study guide, and flashcards.
AP Environmental Science exam at a glance
- Sections: Section I: 80 multiple choice (60%); Section II: 3 free response (40%)
- Time: About 2 hours 40 minutes (90 min MC + 70 min FRQ)
- Scoring: AP 1–5 scaled score — no fixed passing percentage
- Target score: A 3+ generally earns college credit; selective schools want a 4 or 5
- Cost: About $99 per AP exam in the U.S. (College Board, updated yearly)
- Administered by: College Board (Advanced Placement program)
What’s on the AP Environmental Science cheat sheet
- Global Change (15–20%) — the biggest unit — ozone depletion vs. the greenhouse effect, albedo feedback, ocean acidification, and HIPPCO.
- Populations, Earth Systems, Land & Water, Energy (10–15% each) — the exponential-vs-logistic curves, the rule of 70, ENSO, the tragedy of the commons, and energy trade-offs.
- Atmospheric + Aquatic & Terrestrial Pollution (7–10% each) — photochemical smog, thermal inversions, acid rain, eutrophication, and bioaccumulation vs. biomagnification.
- The Living World: Ecosystems + Biodiversity (6–8% each) — trophic levels, the 10% rule, the carbon and nitrogen cycles, keystone species, and succession.
How to use it in your final week
- Lock in the mechanisms first — the carbon and nitrogen cycles, the 10% energy rule, and the difference between ozone depletion (CFCs) and the greenhouse effect (CO₂/methane) are the traps examiners reuse.
- Front-load the heavy units: Global Change (15–20%) plus Populations, Earth Systems, Land & Water Use, and Energy (10–15% each) are more than half your multiple-choice score.
- Drill the three FRQ math moves — percent change, dimensional analysis, and the rule of 70 for doubling time — since the free-response calculations reward clean, labeled setup.
- Read the sheet the morning of the exam as a memory-hook pass, then pair each review with a short timed practice set to keep your Section I pacing sharp (80 questions in 90 minutes ≈ 1 minute each).
The cheat sheet is your review layer — your AP Environmental Science practice test drives the exam-readiness ring at the top of this page. Download it, review, then take a full practice exam (or drill with the study guide and flashcards) to see where you stand.
AP Environmental Science cheat sheet FAQ
Yes — the APES cheat sheet downloads as a PDF for free, with no account and no sign-up. It sits alongside Career Employer's free AP Environmental Science practice test, study guide, and flashcards, so your whole review stack costs nothing.
It condenses the highest-yield facts from all nine College Board units — the carbon and nitrogen cycles, the 10% energy rule, population math and the rule of 70, HIPPCO, smog and acid rain, and climate change — into a fast, printable reference organized by exam weight.
APES is reported on the AP 1-to-5 scaled score, not a raw percentage. Your Section I multiple choice (60%) and Section II free response (40%) combine into a composite that College Board converts to a 1-5, and the cheat sheet reminds you which units carry the most weight toward that score.
A 3 or higher generally earns college credit, and roughly half of test-takers land a 3, 4, or 5 in a typical year. More selective schools want a 4 or 5, so set your target by the AP credit policy of the colleges on your list, then use the sheet to shore up the units that move your composite most.
Click the download button or the preview card at the top of this page and the PDF opens instantly. Bookmark the page so it's one tap away for a final review the morning of your exam.
References
- 1.College Board. “AP Environmental Science Exam.” AP Central, 2026. ↑
- 2.College Board. “AP Environmental Science Course and Exam Description.” AP Central. ↑
- 3.College Board. “AP Environmental Science — AP Students.” AP Students. ↑
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