How things work

"Introduces the reader to x-ray machines."--Provided by publisher.

"Introduces readers to the technologies that make working and living under the sea possible."--Back cover.

"Introduces the reader to hot air balloons."--Provided by publisher.

Text and photographs explore how electricity works.

Presents general information on the development of computers and how they work.

Describes how simple machines utilize the principle of the slope or incline to plow fields, unlock doors, and lift heavy loads.

Explains how heat works and the functions it serves in our world, discussing such areas as conduction, expansion, and evaporation.

Examines the development of medicine, diagnostic devices, drugs, surgical procedures, and replacement parts.

Explains what sensors are, how they work, and how they are used and includes four projects to make a sound sensor, pinhole camera, a barometer and a thermometer.

Shows examples of electronic equipment and explains how they work.