John Gabriel Navarra

An introduction to various types of ships of the world including hydrofoils, ocean liners, supertankers, container ships, ice breakers, and drill ships.

This book applies various social approaches to investigations of real people as they function in a specific context, the family. Of all the social facts we construct, identity is probably the most critical. And of all our identities, cultural identity is one of the most central to who we think we are. We learn our cultural identities first within families. The authors all examine the families they know best, their own. The chapters examine four critical issues: how family members jointly work to construct identity; how parents convey that identity to their children; the conflict between mainstream expectations and the traditions of discrete cultural groups; and the range of possible ways to display identity within and across groups.

Discusses the physics of sound, the human hearing mechanism, and the modern problem of noise pollution, explaining both the beneficial and harmful effects of noise and suggesting some solutions to the noise problem.

A history of how man has measured time and the passage of time, from the rough calculations of the ancients to the atomic clocks and precise measurements by today's scientists.

Explains the parts of a motorboat and their functions and how to safely handle the craft.

Two children take home the only remaining turtle from a newly hatched family and, while learning to care for it, find out about many North American turtles and how a turtle is related to the reptile family.

Describes the scientific causes and historical aspects of some disasters caused by earthquakes, volcanoes, hurricanes, floods, avalanches, and other natural forces throughout the world.

Describes some of the experimental cars being designed to deal with the present problems of automobile safety, air pollution, and gasoline shortage.

This unusually attractive textbook draws upon many scientific disciplines to investigate the history, make-up, and energy systems of the planet Earth.

Text and black and white photographs explore the operation and maintenance of motorbikes and the safety precautions and techniques of riding them.

Six increasingly difficult textbooks introduce students in grades one through six to the various fields of science through observation, experimentation, and interpretation.

Describes various types of planes used throughout the world and their various uses, from trade and cargo to passenger and space travel.

Discusses the use, effects, and abuse of both harmful and beneficial drugs, the role of protective agencies, the availability of drugs, and the problems and treatment of addiction.