This dynamic series introduces the basic concepts of science to young readers. Each title focuses on a common curricular theme to help build a solid learning foundation and encourage a lifelong curiosity about science and nature. Through a combination of clearly written text, colorful photographs, informative charts and illustrations, intriguing puzzlers, and investigative activities, young readers are invited to actively explore the wonders of their complex and fascinating world. Exploring the key scientific concept of physical form in an exciting and playful manner, this book highlights the differences between liquids and solids with practical examples young readers will understand. Matter is defined, and the cycle of water changing from gas to liquid and back is explained. - from Amzon