Examines the structure and history of Earth from the perspective of visitors from a distant galaxy, focusing on the plant and animal life that developed during each of four geologic time periods; looks at the layers of rock found under the ocean floor; and includes a demonstration of how geologists learn from formations in rock layers.
Students in grades five through eight travel along as visitors from outer space investigate earthquakes, their causes and effects, and how they are studied. Includes a look at some of the twentieth century's most devastating earthquakes, and a hands-on investigation.
Examines the structure and history of Earth from the perspective of visitors from a distant galaxy, focusing on the processes of weathering, erosion, and deposition, and their effects on Earth's surface; and includes a demonstration of how running water erodes different types of soil.
Presents an exploration of rocks and minerals, examining such topics as the rock cycle, the three types of rock, the process of mining gold, and others, and includes quizzes on the featured material.
Briefly discusses the history of oceanography and describes what recent oceanographic studies have revealed about the ocean floor and the earth's interior beneath it.
Discusses the origin and composition of the earth's crust, the ways in which it is continually changing, its importance to man, and what it reveals about the history of the earth.
