Book excerpt: Looking for sample exams, practice questions, and test-taking strategies? Check out our extended, in-depth AP Environmental Science prep guide, Cracking the AP Environmental Science Exam! LIKE CLASS NOTES—ONLY BETTER. The Princeton Review's ASAP Environmental Science is designed to help you zero in on just the information you need to know to successfully grapple with the AP test. No questions, no drills: just review. Advanced Placement exams require students to have a firm grasp of content—you can't bluff or even logic your way to a 5. Like a set of class notes borrowed from the smartest student in your grade, this book gives you exactly that. No tricks or crazy stratagems, no sample essays or practice sets: Just the facts, presented with lots of helpful visuals. Inside ASAP Environmental Science, you'll find: • Essential concepts, terms, principles, issues, and processes for AP Enviro Sci—all explained clearly & concisely • Diagrams, charts, and graphs for quick visual reference • A two-pass icon system designed to help you prioritize learning what you MUST, SHOULD, and COULD know in the time you have available • "Ask Yourself" questions to help identify areas where you might need extra attention • A resource that's perfect for last-minute exam prep and for daily class work Topics covered in ASAP Environmental Scienceinclude: • Ecosystems, food chains & food webs • Population studies & trends • Resource utilization & economics • Energy & conservation ... and more!