Exam Day
Time budgets, traps, and a last-week plan.
APES rewards a clear strategy as much as memorized content. Pacing, eliminating bad MCQ distractors, and answering the verb that's asked all swing your score.
Pacing
| Section | Time | Per question |
|---|---|---|
| MCQ ×80 | 90 min | ~67 sec |
| FRQ ×3 | 70 min | ~23 min each |
Read all 3 FRQs in the first minute and start with the one whose data you understand best.
MCQ technique
- Circle EXCEPT / NOT / LEAST in the stem — they flip the meaning.
- For data stimuli (graphs, tables): identify the IV, DV, and control before reading the answer choices.
- Eliminate impossible answers first; many APES MCQs hinge on a single distinguishing detail (e.g., primary vs. secondary pollutant).
- Mark and skip — the easy questions in the back are worth as much as the hard ones in the front.
Calculations (calculator allowed)
- Pull out the math reference at the start of the FRQ section. Write the formula or starting quantity with units BEFORE plugging numbers — earns the set-up point even if your math is off.
- Show every conversion factor as a fraction. APES graders only score what they see.
- Always include UNITS on the final answer. Missing units = lost answer point. This is the #1 way APES students lose points on Q3.
- Watch for tons vs. metric tons; capital "C" Calorie vs. lowercase calorie; W (power) vs. kWh (energy).
Common pitfalls
Last-week study plan
- Drill the math reference until you can apply each formula cold (Rule of 70, half-life, energy unit conversions).
- Re-read the priority deep dives — energy calculations, population dynamics, biogeochemical cycles, pollution & climate.
- Take 2 official released FRQs under timed conditions; grade with the official rubric. Watch for missing-units point losses on Q3.
- Drill all flashcards with the deck — at least one full pass with the K key marking known cards.
- Review your lab experiences — College Board references the AP labs (water-quality testing, soil texture analysis, primary productivity, dissolved oxygen, owl-pellet food chains, ecological footprint, biodiversity index).