- ISBN: 9781599534275 | 1599534274
- Cover: Hardcover
- Copyright: 1/15/2011
Describes the different systems that make up humans and plants: how and why they both eat, drink, and stay alive. As readers use scientific inquiry to learn about these specific living systems, a puzzle and an activity based on real world situations challenge them to apply what they¿ve learned in order to solve the puzzle.