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Recull d'experiències portades a terme en diferents escoles d'educació infantil i primària per a mestres interessats a fomentar en el seu alumnat conceptes químics a partir d'experiències quotidianes (la festa de la castanyada, els caramels, els gelats, el most).
Este libro muestra una selección de experiencias llevadas a cabo en diferentes escuelas de educación infantil y primaria para maestros interesados en fomentar en su alumnado conceptos químicos a partir de experiencias cotidianas que, a veces, no se analizan directamente desde esta perspectiva (la fiesta de la castañada, los caramelos que recogimos en una cabalgata, el mosto que nos llevamos de las colonias, el pan hecho y cocido en el horno de la escuela, los helados que hicimos sin congelador...) pero que demuestran cómo la química contribuye a comprender y gestionar con responsabilidad el mundo que compartimos.
Various kinds of mineralization have been found in many biological systems. Investigations made at a microscopical level using various sophisticated analytical methods and using principles developed in different fields have clarified their mechanisms very much. Sometimes, very similar phenomena have been found in the mineralized tissues of completely different biological systems. Compilation and comparative investigations of such findings obtained from the many specimens systematically collected contribute a great deal to an understanding of the crucial mechanisms and significance of biominerali zation which originated in very primitive organisms and remain in advanced ones. Previously, the ...
The Christian discovery of the Babylonian Talmud is a significant landmark in the long and complex history of anti-Jewish polemic. While the Talmudic corpus developed in the same period as early Christianity, this post-biblical text was largely unknown to the Christians. Full awareness of the Talmud among Christian authors did not arise until the late 1230s, when the Jewish convert Nicholas Donin presented a Latin translation of Talmudic fragments to Pope Gregory IX. Though the Talmud was subsequently put on trial (1240) and burnt (1241/2) in Paris, the controversy surrounding it continued over the following years, as Pope Innocent IV called for a revision of its condemnation. The textual ba...
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A “solid and informative” biography of one of the overlooked heroes of the Second World War (Wall Street Journal). Of the leaders of the American Army in World War II, Jacob Devers is undoubtedly the “forgotten four-star.” Plucked from relative obscurity in the Canal Zone, Devers was one of four generals selected by General of the Army George Marshall in 1941 to assist him in preparing the Army for war. He quickly became known in Army circles for his “can do” attitude and remarkable ability to cut through red tape. Among other duties, he was instrumental in transforming Ft. Bragg, then a small Army post, into a major training facility. As head of the armored force, Devers contrib...
Perspective is one of the most important concepts for an artist to understand. In this valuable beginnerÆs guide, acclaimed artist Ernest Norling teaches you how to use perspective to create a sense of depth and realism in your artwork. Perspective covers techniques for drawing in one-, two-, and three-point perspective, as well as information on how to use vanishing points and the horizon line to establish believable depth. Special attention is given to learning to draw circles, cylinders, and people in perspective. Whether you specialize in drawingùeven cartooning or animationùor painting in acrylic, pastel, oil, or watercolor, a good working knowledge of perspective is essential. DonÆt be surprised if you find yourself referring to this essential guide again and again!