Explores how organisms adapt to changing environments, from changes in physical appearance to adaptations in behavior, and examines the evolution of different plant and animal species.

An overview of the work of scientists who have advanced the study of microorganisms including Robert Hooke, Edward Jenner, Louis Pasteur, Ferdinand Cohn, Joseph Lister, and Alexander Fleming.

Examines the food chain in the city.

The job of a navy is to control and defend the seas around its country's shores, to keep the sea lanes open and safe for merchant ships, and to protect the country's interests overseas. The crew of a navy warship may be called upon to face danger in a hostile environment far from home. It takes courage, skill, and teamwork to do this job. It also requires professionalism and people who take pride in their work"

Hoist the drawbridge and ready the cannons! Even reluctant readers will storm the bookshelves for this high-interest topic where history, math, and magic intersect. This innovative text goes far beyond the familiar medieval European architecture and enhances readers global awareness through Celtic fortified settlements, Roman warrior towns, massive Japanese structures, and other architectural marvels. Fantastic photographs and a helpful map will visually...

Describes the process of digestion, including information on why a balanced diet is important, how the body breaks down food into nutrients, and ways to avoid digestive disorders.