El ciclo del nitrógeno (The Nitrogen Cycle)

Learn all about the National Hockey League. Discover fascinating facts, from record-breaking stars to winning teams and important positions.

Nature is not always kind. Natural disasters like earthquakes and storms can wipe out cities. Entire cultures and their histories are at risk of being lost. When disaster strikes, some people work to save cultural items. They preserve culture for the future! Created in collaboration with the Smithsonian Institution, this Smithsonian Informational Text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step of the engineering design process and is perfect for...

"La máxima obra gramatical y sintáctica de la lengua castellana" Herder presenta la reedición del Diccionario de Construcción y Régimen de la Lengua Castellana, iniciado en 1872 por el lingüista colombiano Rufino José Cuervo, continuado y culminado por el Instituto Caro y Cuervo de Bogotá, y considerado por los especialistas como el mayor monumento gramatical y sintáctico de la lengua castellana. En 8 tomos con más de 8.000 páginas, este diccionario describe las funciones y los problemas gramaticales de cerca de 9.500 voces, define minuciosamente cada una de sus acepciones, y...

Measuring cups are essential in the kitchen, but they’re also crucial in the science lab. Scientists need to be precise in their experiments to test their hypotheses, and science tools such as cylinders for measuring volume aid them in their important research. This appealing book shows that young scientists, too, can use measuring containers for their own science experiments. Important STEM concepts such as volume and units of measurement are explained in a comprehensible manner.