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.

Take a journey into the wild world of reptiles and amphibians! Readers will learn about crocodiles, lizards, snakes, tortoises, and salamanders. Featuring a glossary, index, colorful images and charts, intriguing facts, and clear, informative text, readers will be sure to be enthralled as they move through this engaging, Spanish-translated book.

This Title Explains What An Ecosystem Is And How The Plants And Animals Within An Ecosystem Rely On And Effect Its Existence. Different Types Of Ecosystems Are Described, As Well As The Food Webs Within Them. How Some Changes To An Ecosystem Can Be Good And How Some Harmful Changes Can Destroy Them. Teaches Students What An Important Role They Can Play In Keeping These Intricate Ecosystems Alive.

¿Cuál es el colmo de…? es una hermosa colección de colmos infantiles. Los colmos son chistes para niños, en los que se juega con la imaginación. Libro de colmos para leer y compartir en familia. En este libro de colmos encontrarás - cuál es el colmo de los colmos - colmos de animales (perro, gato, panda, jirafa, etc.) - colmos de profesiones (electricista, abogado, arquitecto, policía, etc.) - colmos graciosos, locos y divertidos - colmos de objetos Además incluye guía para aprender a escribir tus propios colmos La risa es el mejor remedio para curar todos los males, no presenta...

Stem Technology Is A Very Important Topic In Today's World And This Book Will Allow Students To Learn More About Atoms, Molecules, And How Different Temperatures And Situations Affect Them. It Also Introduces Them To The Periodic Table Of Elements And How Even Today More Elements Are Being Discovered And The Periodic Table Continues To Grow.