El ferrocarril transcontinental (The Transcontinental Railroad)

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

Para quien encuentre este libro, mi nombre es Dipper Pines, ¡y traigo serias advertencias acerca de un pueblo lleno de horror, misterio y sucesos sobrenaturales! Para sobrevivir, escribí esta guía con tips y trucos para lidiar con rarezas. Y hablando de rarezas... ¡HOLA! ¡SOY MABEL! Dipper me prometió que, si dejaba de brincar en su cama, ¡me permitiría ayudarle con su libro! Tengo unos tips INCREÍBLES, por ejemplo, cómo comer lo que se supone que no debes, tejido de supervivencia de contacto total, ¡y cómo hacer tu propia mascota de papel! ¡Guau! Mabel, ¡estás arruinando mi...

Examines The Properties Of Matter, The Use Of Energy From Gasoline Or Batteries, And Various Other Sources Of Energy.

Readers begin to explore the vastness of our universe in this engaging volume. They start with subjects such as comets, meteors, planets, and more. Vivid full-page photographs accompany accessible text in both English and standard Latin-American Spanish.

Few natural forces seem as much like magic as magnets. Perhaps that’s why magnets are so fun! Young scientists will love learning about amazing magnets, both natural and man-made. They’ll discover how magnetism is harnessed to help us in many ways. This STEM-supportive volume contains comprehensible text and photographs of students and scientists utilizing magnets. It also includes a simple, fun concluding activity to encourage readers to use this super science tool themselves.