Book excerpt: The sounds that we hear travel as sound waves. This science reader introduces students to the concept of sound waves. With easy-to-read text and detailed, vivid images, this book teaches students important scientific subjects and vocabulary terms like pitch, volume, and vibration. Aligned to state and national standards, the book contains nonfiction text features like an index, a glossary, captions, and bold font to keep students connected to the text. A hands-on science experiment helps students apply what they have learned and develops critical thinking skills.