time measurements

Discusses the different aspects of time and how it is measured, including days and nights, years, calendars, and clocks. Provides suggestions for related activities.

Photographs and simple text present some of the many different ways to measure time.

Beginning with the sundials of the ancient Egyptians, readers will learn much more than just how to measure time. Simple explanations of time zones and the inner workings of classic and modern timepieces accompany brief introductions to some of the greatest scientists to study time.

Tired of everyone calling him slow, Teddy practices his running and keeps track of the time it takes to run to the school bus or the store as he prepares to run a big race.

Contains an introduction to the concept of time, in simple text with illustrations, and provides information on what it is, how it is measured, how it was perceieved by ancient people, and related topics.

Examines the passing of time and how it has been measured through history, from such methods as observation of natural cycles to various kinds of clocks and watches.

Showing readers how to put math to work in their day-to-day activities, this book describes how digital timers are used to time athletic races.

Examines different aspects of time and how we measure it, including seasons, sundials, clocks, local and Greenwich mean time, the prime meridian, time zones, atomic clocks, months, years, and more.

Introduces the concept of time and explains how it is measured in seconds, minutes, hours, days, weeks, months, and years.

Text and activities explain how time, distance, and speed can be measured.