. "Juvenile works" . . "Juvenile works"@en . "An introduction to the Earth's natural processes and systems that explains the biogeochemical, water, carbon, oxygen, nitrogen, and rock cycles; as well as food webs, the energy balance, and more; and includes a quiz." . . . . . . . . . . "Understanding cycles and systems" . . "Understanding cycles and systems"@en . "Understanding Cycles and Systems"@en . . . . . . . . . "Examines some of the cycles and systems found in nature, including information on the seasons, chemical and physical processes, and the weather." . "Earth." . . "Earth (Planet)" . . . . "Earth sciences." . . "Solway, Andrew" . .