Whyman, Kathryn

Explores how electricity and magnetism are closely related and how together they produce the electric current that we use every day to provide heat, light, and power.

Demonstrates how natural, elastic, and centripetal forces cause changes in the shape and direction of things.

Examines the relationship between electricity and magnetism, where they occur in nature, how they produce electric current, and how electromagnets work.

Examines how living things survive in different environments, cope with changes taking place around them, and depend on each other for survival.

Illustrates the properties of light and the production and uses of lenses and lasers. Includes instructions for making a periscope.