Santrey, Laurence

Discusses the qualities of magnets, which attract certain metals and have been used as compasses and as components of many modern inventions, including the telephone, television, and electric motor.

Explains how earthquakes and volcanic eruptions result from the building up of pressure which begins far below the earth's surface.

A discussion of rivers, their types, how they begin, their effect on the land they flow through, and their uses.

Describes the world's largest island, which is also the smallest continent and the only continent that is also a single country.

Describes the physical characteristics of the moon and its relationship to the Earth.

Briefly traces the development of birds and describes some of the many species living today.

A biography of the seventeenth-century Indian princess whose friendship toward the English settlers at Jamestown was a key factor in making the colony a success.

Explains how the growth of industry in modern times has brought about the pollution of air, water, and land, as well as the depletion of natural resources, and emphasizes the importance of conservation.