Querida Olga

Describes the life and work of the scientist who was persecuted by the Inquisition for his views of the universe.

Have you ever thought about how a soccer field is different from a football field? Or how a tennis court is different from a basketball court? Each sport has a surface with a purpose! Explore partitioned shapes with this Spanish math book that seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, sidebars, and math diagrams...

Describes the impact of the light bulb and effective indoor electric lighting, and recounts the life and career of their inventor, Thomas A. Edison.

¿Qué es una forma en música? ¿Es indispensable que una obra musical tenga una forma y una estructura? ¿Qué son el aire cortesano, el anthem, el aria, la balada, el ballet, la canción polifónca, el coro o el concierto? Esta guía cubre la ausencia que ha habido durante varias décadas del siglo XX de una síntesis de las formas de la música. Permite adquirir un conocimiento básico sobre una forma y su evolución, sin necesidad de dedicarse a la compilación de obras muy dispares, historias de la música, tratados sobre composición, etc. Asimismo, el autor analiza de forma...