What Is Physics? Is a simply written, colorful book that introduces young readers to the scientific discipline of physics. Kids will discover that physicists ask lots of questions about how the world works. How fast can a kid run? What happens when a ball is thrown? Why does popcorn pop? How can birds and planes fly? How heavy are objects? Using tools helps physicists answer questions. 24 full color illustrated pages. Reading Level 1-3, Interest Level 2-5. Includes a pronunciation guide for scientific terms.