Energía del viento

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.

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

Learn multiplication and STEM topics on a trip to fascinating locations around the world! This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. Students will learn multiplication while engaged in reading about two fun-filled trips to China and Oahu. The full-color images, math graphs and charts, and practice problems make learning math and STEM concepts easy and fun. The table of contents, glossary, and index will further understanding of math and reading concepts. The Math Talk problems...

Manifest Destiny the name given in the 1840s to a belief that the coast-to-coast expansion of the United States was both inevitable and justified, regardless of the means. Standing in the way were not only the native populations, but also the descendants of Spanish settlers who had lived in the Southwest for centuries. The racist belief that white men rightfully should expand their institutions into the area brought the United States into conflict with Mexico. War was declared in 1846, and by the time the Treaty of Guadalupe Hidalgo was signed in 1848, ending the war, the US had gained...

Escrito de manera concisa y llana, con ejemplos certeramente escogidos, anécdotas e ilustraciones tomadas de la historia de la cultura europea, acompañados siempre de análisis someros y ocurrentes, este libro enseña cómo la noción de belleza evolucionó desde su culto y fundación, en la antigua Grecia, hasta su patrón actual en que, a veces de modo sutil e irónico, penetra en todos los rincones de la sociedad y la cultura modernas.

En esta segunda edición, ampliada y revisada, de «Una espléndida sinceridad» se da información biográfica sobre Robert Louis Stevenson; se hace después un comentario de conjunto a su obra; luego, por orden cronológico, se reseñan cada uno de sus libros de ficción; y, por último, se incluyen comentarios acerca de sus obras restantes —de poesía, libros de viajes, ensayos de distinto tipo—. Junto con «La eficacia del optimismo», sobre Charles Dickens, y «Formas de la felicidad», sobre varias obras y autores decimonónicos, este libro tiene como uno de sus objetivos ampliar ...