A New true book

Explains good and bad germs, the different kinds, how they can help you, how some cause diseases, and how we fight diseases.

Briefly discusses the history and kinds of airports, the various activities in a large airport, and what happens during a trip on an airplane.

Briefly describes ships, from the vessels used by American settlers, to the efficient cargo vessels and floating hotels in use today, and discusses seaports and harbors.

Presents a history of underwater boats, and describes various kinds of submarines, their parts, and personnel.

Briefly describes the basic principles of photography, how a camera works, the different types of cameras and films, how film is developed, and techniques for taking pictures. Also discusses careers in photography.

Briefly discusses different types on man-made satellites, how they work, and their usefulness.

A simple presentation of how our brain and nervous system work together to control our body activities and behavior; to enable us to learn, remember, see, smell, speak, and hear; and to feel emotions.

Text and photographs describe truck engines, fuel, bodies, tractor trailers, and the specialized types of trucks used to haul or convey specific merchandise.

An introduction to weeds that are always "weeds" and weeds that are considered wild flowers.

Describes how machines work and the many kinds of things they can do.