Describes the science behind weather, explaining how and why Earth's weather changes and discussing such topics as air masses, weather fronts, and El Ni?o.
Describes the natural processes that formed Earth and change its surface, discussing the earth's crust, continental drift, plate tectonics, earthquakes, volcanoes, and other related topics.
Presents a short study of how rocks are made, and describes the rock cycle, how rocks are broken down, how landforms are created by erosion, and weathering.
Presents an examination of the earth's renewable and non-renewable resources, from swampy forests to the power of wind, in simple text with illustrations.
Presents an introduction to carbon-oxygen and nitrogen cycles, in simple text with illustrations, explaining how these elements are constantly being made, used, and recycled in the environment.
Presents a short study on the water cycle, and examines the processes of evaporation, condensation, and erosion and how water can change the landscape.
