How Do You Know What Time It Is?: Measuring Time - Brossura

Wells, Robert E.

Brossura

ISBN 10: 0807579408 ISBN 13: 9780807579404

Casa editrice: Albert Whitman & Co, 2002

Riassunto

What would life be like with no clocks and no calendars? How would you know when to get up in the morning? How would you know when baseball season was about to start? Long, long ago, all people could do was watch the sun and moon and try to figure things out. Eventually, they made simple clocks like sundials. And as time marched on, people came up with more ways to measure it. Today, quartz crystal watches and atomic clocks tell us EXACTLY what time it is, at any moment, all over the world.

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What would life be like with no clocks and no calendars? How would you know when to get up in the morning? Long, long ago, all people could do was watch the sun and moon and try to figure things out. Eventually, they made simple clocks like sundials.

Dettagli dell?edizione

• Editore: Albert Whitman & Co
• Data di pubblicazione: 2002
• ISBN 10: 0807579408
• ISBN 13: 9780807579404
• Rilegatura: Copertina flessibile
• Lingua: Inglese
• Numero di pagine: 32
• Disegnatore: Wells Robert E.
• Contatto del produttore: non disponibile