clocks and watches

Examines how people coped in the past without clocks and calendars and how they developed ingenious ways to make life safer and less unpleasant.

An hour-by-hour introduction to telling time follows the activities of a little boy's day from getting up in the morning to going to bed at night.

How do humans perceive time? What are the three different kinds of days? What is a shadow clock and how does it work? Using easy-to-find materials, you can conduct these fun and simple experiments to learn about the science behind time and how it has been measured throughout history.--.

A brief history of time keeping and clock making.

"A young boy learns to tell time on digital and analog clocks as he impatiently waits for a friend to come over to play."--Provided by publisher.

"Introduces activities young readers experience in a matter of seconds, such as sneezing or picking a flower, while teaching ways to measure seconds and how they compare to minutes."--Provided by publisher.

Simple text and photographs introduce clocks, including the different types and the history of measuring seconds, minutes, and hours. Includes online content that contains weblinks, audio and video clips, activities, and other features.

Illustrations and simple text tell a story about Franklin who secretly brought home a baby duck who got separated from its family.

Investigates the mathematics of time through a look at an ordinary day in the lives of cousins Tia, who lives in Mexico City, and Rod, who lives near Chicago. Looks at digital and analog clocks.

Introduces the concept of time through the correspondences of pen pals who describe to one another the events and traditions that take place where they live throughout the year. Includes related math activities.