Ranger Rick's NatureScope is a creative education series dedicated to inspiring in children an understanding and appreciation of the natural world while developing the skills they will need to make responsible decisions about the environment. The topic of this issue is "Geology: The Active Earth." Contents are organized into the following sections: (1) "Earth on the Move," describing information and activities on the structure of the Earth, the theory of plate tectonics, and earthquakes and volcanoes; (2) "Rocks and Minerals," giving information and activities on rock and mineral composition, formation, and classification; (3) "Shaping the Landscape," providing information and activities on forces that wear down landforms and forces that build them up; (4) "Secrets of the Past," offering information and activities on how and where fossils form, what they tell about the past, and how scientists determine the ages of fossils; (5) "People and Geology," providing information and activities on the origins and uses of rocks, minerals, and fossil fuels, and some of the problems caused by their use; and (6) "Appendix," featuring bibliographic and other reference information. (WRM)