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Explains how sounds are made and the purposes they serve for both humans and other animals.

"Ticking clocks, claps of thunder, the human voice--sound is anything that can be heard. Hearing sound is one thing, but understanding just how it works and what its properties are is quite another. Answering these questions and others concerning supersonic speed and breaking the sound barrier, how the human voice and ear work, and the age-old question of whether a tree falling in the forest unobserved makes any noise, this volume provides an accessible...

"Carefully leveled text and vibrant photographs introduce early readers to the concept of opposites by encouraging them to compare things that are loud with things that are soft. Includes tools for teachers, a table of contents, words to know, and an index."-- Provided by publisher.

"CRASH, BARK, BOOM! Sound is all around us. But what is it? How does sound work? Readers will learn the answers to these questions and more through easy-to-read text and vivid photographs. An experiment rounds out the book and provides a hands-on learning experience to encourage deeper understanding. Meets Next Generation Science Standards"-- Provided by publisher.

At one time, fighter pilots thought they could never fly faster than the speed of sound. Now, many planes-and the people in them-hurdle through the sky at Mach 1! Readers will find sound a fascinating subject as they discover the many ways this form of energy is used today, including ultrasound machines that allow doctors to check on unborn babies and the various pitches of musical instruments used in music. Including information about how human and...

Simple text and bright photographs explain the concept of sound for beginning readers. The book concludes with a simple, kid-friendly activity.

"Scooby-Doo and the gang learn about the science of sound and solve a mystery about a zombie"-- Provided by publisher.

"Sounds can be loud. Sounds can be soft. We use our ears to hear all kinds of sounds. But how is sound made? Let's investigate to find out about sound!"-- Provided by publisher.

"Sounds are all around us. Some sounds are loud. Others are quiet. Some sounds are high. Others are low. The sounds that we hear travel as sound waves."-- Provided by publisher.

Sounds are all around us, but what makes sound? How does it travel? What can it do? These questions and more will be answered as the science of sound energy is examined in depth. Readers will learn how the physical movement of objects creates sound, as well as the qualities of sound and how they vary, and are received. The uses of sound energy in various fields will be explored. Simple illustrations of sophisticated scientific concepts will enhance...