This updated test preparation manual presents two full-length practice exams plus a brand-new diagnostic test with all questions answered and explained. Also included is a detailed review that covers all test topics. The topics fall into three categories: Earth Systems and Resources; The Living World; and Population. Each review section is filled with practice questions and quizzes with answers. The manual also presents an overview of the test, helpful test-taking strategies, and hundreds of diagrams and illustrations. This version of the manual comes with an enclosed CD-ROM that presents two additional full-length practice tests with answers and automatic scoring.