CliffsNotes AP Environmental Science : Your complete guide to a higher score on the AP Environmental Science exam. Reviews the AP exam format and scoring. Proven strategies for answering matching; problem solving; multiple choice; cause and effect; tables, graphs, and charts; and basic math questions. Hints for tackling the free-response questions. Reviews all subject areas you'll be tested on. Includes 3 full-length practice exams with answers and complete explanations.