Mae Blacker Freeman

Explains the principles of gravity by comparing activities performed in outer space to similar activities performed on earth.

Discusses the invisible but real world of air whose volume fills tires and bags and whose force lifts planes, trains, and boats.

An easy-to-read introduction to space flight tracing a manned rocket trip to a space station and the moon.

Describes simply the general characteristics of stars.

Explains the power of a magnet--how it works and what it does. Includes home experiments.

Describes what a space station of the future might look like, how it will operate, and the duties of the crew members.

Describes the many forms and uses of water and the cyclical journey it makes over and over again.

An introduction to archeology, telling about ways archeologists work, dating and care of old objects, and the things archeologists have found and what they have learned from them.

Takes the reader to the bottom of the sea to walk underwater, ride in a sea scooter, see a fish ranch, and view aquanauts at work in their undersea base.