| Gaia: | Two kinds of stuff fundamentally make up the universe: matter and energy. This volume explains the role that energy plays in the universe, describes the basic types of energy - including heat, light and electricity - and recounts how matter is transformed into energy by stars and by man-made nuclear devices. Chapters of text in this book alternate with picture essays. The essays illustrate or compliment the chapter, although each can be read independently. Thus Chapter 5 discusses chemical energy; Essay 5 describes how oil, a prime source of such energy, is obtained and put to use. Chapter 6 recounts the discovery of electricity, while the following essay tells how to build a miniature electric motor with paper clips, thumbtacks, two nails and feet of wire.
|
|---|