by Bureau of Land Management (Author), U. S. Department of the Interior (Author), Division of Education (Author)

On cover: Join the Adventure. Focuses on Earth features that formed over long periods of time and that cannot be replaced as humans remove and make use of them, These are also called nonrenewable resources. Includes fun facts, a crossword puzzle, and activities about rocks and fossils for explorers ages 8 to 12, Illustrated in color.