Energía del viento

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.

Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

Por este libro desfilan iglesias, monasterios, santuarios, capillas, los castros, pazos y castillos, romerías y reparadoras fiestas de remotos orígenes. Hay además una ruta literaria, imprescindible dado el excelente número de escritores gallegos, entre los mejores del siglo XX español. Las rutas se interrelacionan: por la monumental se llega a la almenada, por la devota a la monumental, por la festiva a la devota, por la literaria a la monástica...

The unsinkable luxury liner known as the Titanic may have sunk on its first transatlantic voyage in 1912, but people remain riveted to its storied legend. The collision with the iceberg in the North Atlantic was not the only mistake that was made that day. In this spellbinding volume, readers will learn about the passengers and crew aboard the doomed ship and what really happened that tragic night. Historical photographs will transport them back to the glamorous era, while the narrative paints an absorbing picture of the Titanic's sad fate.

Todos los años, grandes y pequeños animales se ven obligados a migrar para sobrevivir. Tanto en el mar como en la tierra, estos animales enfrentan obstáculos y fuerzas naturales para poder reproducirse, alimentarse y mantener a su especie fuerte para futuras generaciones. Este libro es una introducción a las travesías peligrosas de la zebra, de la morsa y del cangrejo rojo de la Isla de Navidad, quienes luchan contra chitas hambrientas, locas hormigas amarillas y hasta contra su propia especie para poder completar la travesía de su vida. National Geographic apoya a los educadores K-12...

GRADES PK–2: This 16-page Spanish title (8'' x 8'') introduces early readers to the leopard—what they eat, why they climb trees, and how far they can jump! FEATURES: Simple Spanish text and vivid photos present fascinating facts about an amazing African animal. Comprehension questions are included to advance learning. EARLY BILINGUAL LITERACY: Help young learners strengthen their bilingual skills—add the English version of this title into your collection, too. BUILD A LIBRARY: Collect every title from the collection to stock your home or classroom library. Reading together is a great...