Peter D Riley

Introduces electricity and circuits, as well as some of the electrical devices that are found in the home, such as refrigerators, CD players, and hair dryers. Includes related activities.

Introduces the basic science behind food chains and presents experiments to show how they work.

This book presents an introduction to different kinds of sounds and how they are made.

Describes different kinds of materials and uses simple experiments to explain how their shape or state of being can be changed.

Text and activities demonstrate that materials are solids, liquids, or gases, and while they have special distinguishing features called properties, they can be changed in ways known as processes.

Presents one hundred facts about planet Earth, covering fossils, mountains, weather, and other topics, and includes illustrations, puzzles, quizzes, and projects.

Presents one hundred facts about science, covering lasers, magnets, computers, and other topics, and includes illustrations, puzzles, quizzes, and projects.