Describes how a compost heap works, what it needs to work well, and what plants, insects, and bacteria help to break down the organic refuse found in one.
Describes how electrical energy is generated in power stations and how it travels through pylons, power cables, and wires into people's homes. Includes activity.
Among the many works devoted to our space environment, this serious and objective book by Mr. Delobeau should occupy a special place. It has become rare for works on such a subject to be written by co
"Have you ever wondered how the human brain works? What about your television? It's a complicated answer, but circuits are a simple way to explain it. Circuits make it possible to turn on a light. The
"A snail eats a leaf. A bird eats the snail. A cat eats the bird. Living things need one another to survive. This is how a food web works. Even you are part of a food web! What did you eat for breakfa
Don't know how a car works? It's time to lift up the hood and find out. Discover how the internal combustion engine powers our cars. Learn how carmakers factor in physical forces when they design a ca
Follows the sun from dawn to dusk to explain how light rays travel, how shadows are formed, how the moon lights up the night sky, and more. Includes activity.
