These are sample student resources from Chapters 7, 14, and 23 of the enhanced e-book that includes Self-Assessment Quizzes, Box Extensions, Flashcards, and Dynamic Animated Figures. These are sample resources only. Student resources are only contained in the enhanced e-book, available for student purchase from our online catalog at or all leading e-book vendors. For more information or an instructor review copy, please contact your Oxford University Press representative.