The Tell Me Why series offers answers to some of the most compelling questions. Explanations and appealing photos encourage curious readers as they continue their quest for knowledge. Additional text features and search tools, including a glossary and an index, help students locate information and learn new words. Prompts encourage students to LOOK, MAKE A GUESS, and QUESTIONS. The combination of reading, inquiring, and interacting with the information helps readers to master content with a focus on the Common Core State Standards.