Dover-Let's Go Outside. How do plants use chlorophyll? What is the water cycle? Where is Yellowstone National Park? This wide-ranging workbook answers all of these and many more earth science questions. This book includes coloring pages, simple science experiments, journals, and matching games. Ages 6-7. Softcover, 128 pages. Published Year: 2015. ISBN 978-0-486-80259-6. Made in USA.