BEFORE YOU BEGIN LESSON 1<br > This is the first of 26 lessons that will open your eyes - in the broadest<br > sense of the phrase - to the geologic wonders of our beautiful Earth.<br > As you know， each lesson primarily consists of three parts: readings<br > from your textbook， a video program， and this study guide. In addi-<br > tion， you may have an assigned laboratory activity to go along with<br > some of the lessons. While you ve read many textbooks and seen many<br > television programs， you may never have worked with a document<br > such as the study guide. So before you read the content for this first<br > chapter， we ll give you a little information about the purpose of each<br > section that will appear in each of the 26 study guide chapters. Know-<br > ing how the guide is organized will help you throughout your "reveal-<br > ing" study of the planet Earth.<br >OOAL: This section presents the overall purpose of the lesson. It<br >helps you keep in mind the overriding principle guiding the lesson.<br >LEARNING OBJECTIVES: The specific objectives that will be the<br >instructional focus of this lesson are presented in this section. Learn-<br >ing these objectives will enable you learn the material and reach the<br >Goal of the lesson.<br >INTRODUCING THE LESSON: This section is designed as an ad-<br >vance organizer - a motivator - for what the lesson covers. Organizers<br >such as this can help make learning more meaningful， ensure better<br >retention， and pique your interest.<br >LESSON ASSIGNMENT: Here， you will be given a concise， easy-to-<br >locate place in each study guide chapter where the steps， assignments，<br >and activities are listed that you should follow to master the Objectives<br >and achieve the lesson s Goal. The word "step" is used to reinforce the<br >idea that learning is a process.<br >