This publication is intended to serve as a teacher's guide for the instructional television series entitled "What On Earth?" The program, a one-year course for eighth-grade students, is composed of units on the earth as a body in space, meteorology, oceanography, and geology. Each topic is covered through a series of television programs. In the guide, each lesson is described in terms of a synopsis, concepts, objectives, learning activities, and references. Textbook references for each major unit of study are provided. As additional material, the publication contains lists of equipment for the earth science classroom, a textbook bibliography and a directory of publishers and distributors. (CP)