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Clockworks: From Sundials to the Atomic Second

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Visit this site: http://www.britannica.com/clockworks/main2.html

Description: A site about the development of instruments that have measured time over the centuries. Each instrument has a page featuring a description and an illustrated diagram, and most include a QuickTime animation demonstrating how the mechanism works. Iinstruments include: Sundial; Clepsydra; Astrolabe; Candle clock; Sandglass; Weight-driven clock; Spring-driven clock; Pendulum clock; Quartz watch; Cesium atomic clock. See also the article "Measuring Time."

Levels: Middle School (6-8), High School (9-12)
Languages: English
Resource Types: Web Interactive/Java
Math Topics: Calendars/Dates/Time

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