Duke 
Waves of Light and Sound [PDF ebook] 

In Waves of Light and Sound, students will learn about electromagnetic and mechanical waves, the properties of waves and sounds, pitch, amplitude, and much more. Readers will love discovering new information in this chapter book while also reinforcing learned skills with comprehension and extension activities. The Let’s Explore Science series allows readers to dive into the world of fascinating science-related topics while strengthening reading comprehension skills. Each 48-page title features full-color photographs, real-world applications, content vocabulary, and more to effectively engage young learners.