Crisis energética: El futuro de los combustibles fósiles (Energy Crisis: The Future of Fossil Fuels)

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

Quick Minds is an exciting, six-level course for young learners in Spain that enhances your students' thinking skills, sharpening their memory while improving their language skills. The Activity Book mirrors the content of the Pupil's Book. It practises the core vocabulary and grammar and consolidates skills development, with a variety of exercise types. 'Do that!' sections provide opportunities for speaking, while the Review and Culture sections provide extra listening practice and 'Get it right!' pages cover problem areas for Spanish speakers. A Grammar Practice section at the end of the...

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

La Química es una ciencia experimental. Trata de desentrañar los secretos de la materia en cuanto a su composición, propiedades y transformación. A lo largo de la historia, este estudio ha ido evolucionando desde la simple observación exterior hasta las sorprendentes teorías actuales sobre su naturaleza íntima. La Química actual es una ciencia básica para otras ciencias, constituye el fundamento de infinidad de análisis que se hacen en diagnósticos médicos, en criminología, en paleontología, etc., pero también es una ciencia que participa en la vida cotidiana (desde el aire que ...

¡Únete aCamila el hada de los pastelillos en su mundo mágico!Diviértete completando las lindas actividades con etiquetas de pastelillos. Cada página de este libro en forma de pastelillos está llena de diferentes actividades y juegos.