John O. E. Clark

Describes the fundamental units and measuring devices that scientists use to bring systematic order to the world around them.

"Though we take light for granted, the world's greatest scientists have long puzzled over its nature, properties, and behavior. Its incredible speed, mysterious frequency, relationship to color, form of travel, and uncanny ability to reflect, refract, diffract, and be absorbed altogether make light the ever-elusive quarry of science's greatest hunters of knowledge and understanding. This is the enthralling account of their investigations and discoveries,...

"Mechanics is the branch of physics that deals with forces and movement. Aligned to the science curriculum, this stimulating volume explores topics such as measurement, mass and weight, falling objects, force and acceleration, stability and equilibrium, energy, vectors and scalars, work and power, loads and levers, inclines and friction, and pulleys and gears. Nine projects help readers grasp a key scientific principle, such as cheating the force...

Electricity might seem like a modern convenience that provides us with light, heat, communications, and power, but readers will learn about the history of electricity, from its ancient discovery to the present. The text includes a full chapter extolling the important contributions by the one and only Benjamin Franklin and a handy timeline for visual reinforcement. In this instructive volume, readers learn how electricity is produced, whether it's...

Describes various minerals and where they are found; mining methods and machinery; and the need to conserve resources. Features projects throughout.

Essays and illustrations provide basic knowledge about a variety of scientific topics.