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.

Discusses the natural process of decay in nature's life cycle, as well as how we can speed along the cycle of decay for man-made products.

Explore the different types of ecosystems and biomes through this captivating Spanish book, featuring vivid images, charts and graphs, and interesting facts! Readers will be excited as they learn about the tundra, grassland, desert, and temperate forests, as well as riparian and pelagic biomes. A glossary, index, and an engaging experiment are included to help children further understand the content.

Explains the basics of the most powerful machines around town and describes their major parts and functions, featuring dynamic photographs that will make little ones feel as though they are in the driver's seat.

Albores del año 1875. Las familias de Luigi y Luigia dejan su caserío alpino y se unen a la marea emigratoria. ¡Les sobraban razones para arriesgarlo todo! En realidad era muy poco lo que dejaban atrás. Sus brazos y sus sueños eran sus mayores y únicos tesoros. Lo demás se daría por añadidura, o no... Junto a Giovanni Battista y Angela se unen a la reciente fundación de la colonia Villa Libertad, en el noreste entrerriano. ¡Todo está por hacerse! El lector está invitado a recorrer el desafiante y apasionante itinerario histórico y biográfico de estas dos familias vénetas en...