Levy, Janey

Learn how hurricanes form and become some of nature's most powerful disasters.

Explains what a coral reef is, looks at the plants and animals of coral reefs, shows where they are located in the world, explains the process of symbiosis, profiles Australia's Great Barrier Reef, and discusses what is being done to protect coral reefsystems.

Text and photographs reveal the culture, history, artifacts, and traditions of the African nation, Kenya.

Examines the history of krypton, looks at its place on the periodic table of elements, and discusses its atomic structure, uses, and compounds.

Provides an introduction to the medieval age, looks at some of the foods people ate during that period, and offers an opportunity to work with fractions through manipulation of recipes for foods that might have been served at a medieval feast.

Profiles the best riders involved in motocross, including Ricky Carmichael, Ivan Tedesco, and Jessica Patterson, describing their starts in the sport and career highlights.

Introduces the North American prairie, its importance to Native Americans, and some of the wildlife that can be found there, including hawks, badgers, and buffalo.

Explains what a tropical savanna is, looks at the climate, plants, and animals of tropical savannas, shows where the habitats are located in the world, profiles tropical savannas in Africa and Australia, and discusses the effects of people on tropical savannas and what is being done to protect them.

Examines the history of Iran and discusses how the country came to be the most significant Shiite power in the Islamic world.

An exploration of illegal immigration and amnesty that provides background information and discusses legislation, principle debates, and possible solutions.