Energía del viento

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

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

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

Based on the #1 New York Times Best-Selling series, this timeline of world history gives a fresh take on global events, from King Tut to Malala Yousafzai. Basada en la serie más vendida del New York Times, esta cronología de la historia mundial ofrece una nueva visión de los acontecimientos mundiales, desde el rey Tutankamón hasta Malala Yousafzai. For the first time ever, the Who Was? subjects are gathered into a single title! The Who Was? History of the World is a journey along the timeline of history, noting the birthdays of 150 people in the series and what was happening in the world...

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...

Cyclists Zoe and Kate are friends and athletic rivals for Olympic gold, while Kate and her husband Jack, also a world-class cyclist, must contend with the recurrence of their young daughter's leukemia.

Aprendamos a Amar' es un Proyecto de Educación Afectiva y Sexual que consta de unos Materiales de Trabajo y una oferta de Cursos de Formación de Monitores. El programa completo que presentamos está dirigido a educadores y jóvenes de edades comprendidas entre 11 y 14 años. En su interior, siete unidades didácticas y un anexo, ofrecen un totoal de treinta y siete actividades posibles, que faciliten y hagan efectivo a padres, profesores, catequistas y educadores en general, el planteamiento de la sexualidad desde la belleza de una perspectiva nueva y verdadera, que responda a los deseos...