THE THIRD PLANET. Earth in Space: The Science of the Earth System. Earth's Materials: Atoms, Elements, Minerals, and Rocks. Earth in Time: The Rock Record and Geologic Time. THE DYNAMIC EARTH. Plate Tectonics: A Unifying Theory. Earthquakes and the Earth's Interior. Folds, Faults and Mountain-Building. From Earth's Interior: Volcanoes and Igneous Rock. THE CHANGING EARTH. Weathering and Erosion. From Sediment to Rocks: Rocks that Form Near the Earth's Surface. New Rock From Old: Metamorphism. Putting It All Together: Where Different Rocks Form and Why. WATER WORLD. Water On and Under the Land. Ocean, Atmosphere, and Coastlines. Deserts, Glaciers, and Climatic Change. LIVING ON PLANET EARTH. A Brief History of Life on Earth. Earth Resources. Geosciences for the 21st Century.