Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Ensayu sobre mitoloxía, arquitectura, costumes y creyencias populares de la contorna de Cabreira, na provincia de Llión. El filu conductor escoyíu pol autor yía precisamente l'arquitectura popular d'esta zona de los Montes de Llión, una mirada histórica dende los primeiros asentamientos castreños prerromanos hasta las últimas edificaciones tradicionales que datan de finales del siegru XIX. L'estudiu contempla al traviés de los testimonios orales la etimoloxía del vocabulariu cabreirés y la toponimia, pero sobremaneira enfatiza la contribución y interpretación de mueitas lliendas, ...

Presents pairs of photographs of similar items, including a hot dog and an ice cream cone, and the sun and the sea, to introduce the difference between hot and cold.

Colección de cuadernos independientes de los cuatro cursos de Secundaria. Para trabajar y consolidar todos los contenidos de la ESO de acuerdo a las necesidades de cada alumno.

Readers will discover what you can do at a post office, such as buying stamps, checking a PO box, and sending a letter. This book's easy-to-follow narrative makes it perfect for beginning readers. A photo glossary offers new vocabulary, while a website link page suggests routes to more information.