This best selling AP Environmental Science study guide includes: A new diagnostic test to pinpoint the test taker's strengths and weak areas Two full-length practice exams with all questions answered and explained A detailed review of all test topics, with practice questions and answers An overview of the test plus helpful test-taking strategies Hundreds of diagrams and illustrationsThe book comes with a CD-ROM that presents two additional full-length practice tests with answers and automatic scoring. BONUS ONLINE PRACTICE TEST Students who purchase this book or package will also get FREE access to one additional full-length online AP Environmental Science test with all questions answered and explained.