"How we measure time-both when and how long-is the subject of the many experiments in this small, lively, information-packed volume....For each experiment, there is a brief statement of principle, then four small sections: what you need, what to do, what happens, and why....The focus is on basic discoveries and applied science, from constructing a perpetual calendar or an hourglass to telling time by the stars....There are also fascinating facts that make you think about what you take for granted (Why do clocks count to 12 and not 24?)...style is clear and informal, with a full glossary..."--I>Booklist

. 96 pages, 95 b/w illus., 5 3/8 x 8 1/4.

 

There are 96 pages in this book. This book was published 1998 by Sterling Juvenile .

E. Richard Churchill, Louis V. Loeschnig, and Muriel Mandell are authors of books in the No-Sweat Science series, published by Sterling Publishers. They each have written several other science-related books for children and young adults. E. Richard Churchill, Louis V. Loeschnig, and Muriel Mandell are authors of books in the No-Sweat Science series, published by Sterling Publishers. They each have written several other science-related books for children and young adults. E. Richard Churchill, Louis V. Loeschnig, and Muriel Mandell are authors of books in the No-Sweat Science series, published by Sterling Publishers. They each have written several other science-related books for children and young adults.

This book has the following chapters: Talking about time; the time word game; how long is a minute?; timeline; telling time by the moon; calendar timeline; about calendars; moon time; string calendar; perpetual calendar; four- and ten-day weeks; telling time by the sun; sundial timeline; moving shadows; shadow watch; shadow timepiece; make a sundial; hand dial; noon holes; time zones; hours in a day; cloudy day and night timetellers; candle timekeeper; water clock; make an hourglass; invent your own clock; telling time by the stars; astronomical timeline; a star map; star time; make a cereal box planetarium; mechanical clocks; make a yo-yo clock; how gears work; why clocks count to 12; jewels in clocks; why a "watch"?; a grandfather clock; railway timetables; international date line; AM and PM; Summer Time; super clocks; electric clocks; make a simple electric motor; make a coin battery; what are quartz crystal clocks?; digital clocks; glowing in the dark; radiocarbon dating; atomic clocks; time machines.