Como se mide el tiempo?

Overview

El tiempo es algo misterioso. No puedes verlo. No puedes oírlo. No puedes atraparlo con una red y ponerlo en un tarro. Pero sabes que el tiempo existe, porque puedes sentir cómo pasa. ¿Cómo sería el mundo sin relojes ni calendarios? ¿Cómo sabrías que es hora de levantarse por la mañana? ¿Cómo sabrías cuántos días faltan para las vacaciones? Muy antiguamente, lo único que podía hacer la gente era mirar el Sol y la Luna y tratar de medir el tiempo. Transcurrieron los siglos y los egipcios idearon los primeros ...
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Overview

El tiempo es algo misterioso. No puedes verlo. No puedes oírlo. No puedes atraparlo con una red y ponerlo en un tarro. Pero sabes que el tiempo existe, porque puedes sentir cómo pasa. ¿Cómo sería el mundo sin relojes ni calendarios? ¿Cómo sabrías que es hora de levantarse por la mañana? ¿Cómo sabrías cuántos días faltan para las vacaciones? Muy antiguamente, lo único que podía hacer la gente era mirar el Sol y la Luna y tratar de medir el tiempo. Transcurrieron los siglos y los egipcios idearon los primeros relojes, muy simples: los relojes solares. Conforme ha ido pasando el tiempo, se han ido descubriendo métodos para medirlo. Hoy día, los relojes de cuarzo y los relojes atómicos nos pueden indicar la hora exacta en cualquier momento. Con este libro aprenderás muchas cosas acerca de los misterios del tiempo.

This book teaches all about the mysteries of time. It covers how time has been viewed from our early ancestors, who noted how the sun traveled across the sky, to the ancient Egyptians, who used "Shadow Stick clocks" to mark its path, through the use of present-day quartz and atomic clocks. The colorful illustrations and diagrams make this educational book fun and easy to understand.

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Editorial Reviews

Criticas
Gr 1-4-Linking expressive and humorous illustrations to large inviting type, Wells has created a first-rate introduction to what time is and how it is measured. He begins by comparing time to wind something we can see the effects and passage of without being able to see the thing itself and then moves along to the various ways of telling time throughout history: watching the sun, making sundials and adding gnomons, through water clocks, and, finally, with clocks. Along the way the author explains why night and day exist, why the Moon seems to change shape, and how our current calendar dates back to the Egyptians and Julius Caesar. He concludes with a look at time zones and the idea of time travel, which, he says, occurs all the time, though only in one direction. Direct, informative and at times whimsical, this title is a winner and should prove popular in libraries and bookstores. Coop Renner, Fairmeadows Elementary, Duncanville, TX Copyright 2003 Reed Business Information.
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Product Details

  • ISBN-13: 9788426132871
  • Publisher: Editorial Juventud
  • Publication date: 6/1/2003
  • Language: Spanish
  • Edition description: Spanish Language Edition
  • Pages: 34
  • Sales rank: 1,192,524
  • Age range: 7 - 9 Years
  • Lexile: 790L (what's this?)
  • Product dimensions: 10.56 (w) x 7.44 (h) x 0.32 (d)

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