Who first discovered static and why was this important? What is an LED? This fascinating book looks at the historical controversies that surround the discovery and theories of electricity and tells the stories of the scientists who worked on them. It also examines how the different theories based on electricity were arrived at, how they were tested, and what impact these theories and discoveries have had on our understanding of science today.

This book explores light and sound, describing how they move and which moves faster.

"The world is full of materials, and they are all different. This book explores the wide range of materials we use, looking at their properties and what makes them suitable for different applications"--From the publisher's web site.

"All materials can exist in different states, but what are the differences, and how do materials change from one state to another? This book explores solids, liquids, and gases, looking at their properties and the processes involved in changing state"--From the publisher's web site.