Search

Simply describes the functioning of the digestive system and explains the process of digestion.

Chronicles five presidential administrations from Theodore Roosevelt to Calvin Coolidge that profiles their early years, political careers, presidency, and legacy.

Discusses the benefits of air, and looks at the harmful effects and methods of preventing air pollution.

Discusses the erosion and pollution of soil, the harmful effects of these processes, and ways of preventing them.

Describes the various parts of the human circulatory system and explains how and why blood is circulated throughout the body.

Explains what minerals are, describes their elements and properties, and identifies ore minerals and minerals found in rocks.

Photographs and text provide a brief description of the Nazi persecution of Jews in the first half of the twentieth century, discussing the development of the "Final Solution," and related topics.

Describes how oil spills occur, the damage they cause to the environment, clean-up operations, and ways to prevent oil spills.

An introduction to the capitol building in Washington, D.C., that describes its structure, uses, and construction.

Traces the history of the Statue of Liberty, exploring how and why it was built and what it means to the American public.

Provides information about how and why things move, and includes fun facts, a related experiment, and a glossary.

A simple explanation of blimps, airships that are lighter than air, and how they have been used in both war and peace.

Describes different kinds of trucks, including tractor trailers and tank trucks, pick-ups, tow trucks, fire trucks, garbage trucks, vans, and recreational vehicles.

A brief biography of Eva Peron, wife of Argentine president Juan Peron, providing information on her childhood, her failed acting career, her political activities, and more.

Describes the various parts of the human respiratory system and then explains how that system brings fresh oxygen into the body and carries carbon dioxide to the lungs to be expelled.