Grade 4: Science: Light and Sound

A simple exploration of light that covers sunlight, electrical lights, shadows, and how animals and plants need light to live.

A simple exploration of sound that covers pitch, volume, hearing and ears, how humans make sounds, and why animals make sounds.

Here is a spectacular, thought-provoking, and highly informative guide to the fascinating story of light. Superb full-color photography of original equipment, intricate scientific instruments, revealing experiments, and 3-D models offers a unique "eyewitness" view to the incredible discoveries that have transformed our world. Learn how fiber optics can transmit light, what happens during an eclipse, why images are reversed in mirrors, how a liquid crystal display works, and what makes a hologram.

What is light? Why do we see different colors? Why we appear upside down in some mirrors? Investigate the dazzling world of physical science! Find out for yourself about Light through experiments that you can do at home. Did you know that white light is made up of many colors? Light will show you the importance of investigating and understanding the physical world around you. Book jacket.

What is sound? How does sound move through air and water? Why are some sounds high in pitch and others are low? Investigate the curious world of physical science! Find out for yourself about Sound through experiments that you can do at home. Did you know that some animals hear sounds that you cannot hear? Sound will show you the importance of investigating and understanding the physical world around you.

Science Works! shows how science and scientists really work through experiments children can do themselves. Nothing is quite as instructive as hands-on experience. Each volume is impressively illustrated and, when combined with comprehensive instruction, produces a wealth of do-it-yourself science projects that will instruct and entertain. Each activity uses common, easy-to-find materials and requires average skills to complete.