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The United States grew rapidly from the time of the Louisiana Purchase to the building of the Transcontinental Railroad. All of this expansion came at the expense of Native American populations that had either lived in the region for centuries or been forced there from ancestral homes in the East. Tribes memorably fought on their own and together in an doomed effort to retain the land and a lifestyle that had long sustained their families. This book outlines some of the major conflicts of the Westward Expansion, and of the treaties and were signed, and often broken, by representatives of the...

Desde los lagos hasta las nubes, hasta la lluvia que cae de nuevo a la Tierra, descubra cómo el agua cambia a través de diversos procesos para formar el ciclo del agua. From lakes, to clouds, to rain that falls back to Earth—discover how water changes through various processes to form the water cycle.

Cerca de 100 animales se esconden en cada una de las ilustraciones a doble pgina que contiene este libro. Las escenas representan la fauna y los distintos hbitats de la Tierra, desde el abrasador desierto del Shara hasta las glidas regiones rticas, los pantanos de Florida y la Gran Barrera de Coral australiana. Los animales del mundo es un libro para pasar muchas horas entretenidas. Adems, junto al dibujo de cada animal se incluyen datos y curiosidades presentados de forma clara y concisa.

Imagine being lost and stranded in the desert. Would you know what to do to survive? This useful Spanish-translated nonfiction title explains the important skills needed to survive in the desert. With helpful diagrams and images, definitions, tips and instructions, informational text, a bibliography, and a list of other helpful websites, readers can be assured that they will learn about the dangers of heat exhaustion, desert plants that could aid in survival, and other helpful tips in order to survive in an emergency.