Sound

Learn how sound waves are formed and how they change as they move.A True Book: Physical Science allows readers to find answers to puzzling questions as well as discover how people have used physical science to make countless innovations throughout history. This series includes an age appropriate (grades 3-5) introduction to curriculum-relevant subjects and a robust resource section that encourages independent study.Readers will find out how people hear sound, how sound waves can be used in unexpected ways, how the properties of a sound wave affect the way it is heard, and much more.