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Introduces children to the basic concepts of sound with step-by-step instructions for simple activities and experiments on sound sources, recording sounds, the Doppler effect, echoes, and more.

Introduces basic concepts of chemistry through a variety of experiments, exploring such topics as changes of state, distillation, and catalysts.

Text and photographs introduce readers to different types of rescues at sea, describing the necessary skills required by rescue crews.

Examines how the properties of various materials and substances change when they are mixed with one another.

Surveys the history and traditions of the Olympics.

Uses simple texts and photographs to explain for young readers the different ways various materials can be cooled.

A basic introduction to ambulances.

Looks at the extraordinary advances that have been made in medicine since the start of the twentieth century, and how these changes have affected the lives of millions.

Describes the history, design and construction, and components of inventions that changed the world, including the steam engine, automobile, tank, telephone, computer, and many others.

Explores the job, equipment, and essential skills required by mountain rescuers.

Examines the evolution of gunpowder, it's design, and how it affects today's world.

Examines the evolution of light bulbs, their design, and how they affect today's world.

Text and photographs help readers explore the science concepts behind sports.