¿Por qué hibernan los animales? (Why Animals Hibernate)

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

Bécquer, Machado, Juan Ramón son algunos de los poetas que han seguido la estela de Ferrán. Las coplas populares, los cantares que son poesía breve, seca, natural, fueron recogidos, y creados, por un poeta del que escribió su amigo G.A. Bécquer: ''en la obra de Ferrán, la poesía popular, sin perder su carácter, comienza a elevar su vuelo'';

It was known as the age of the dinosaurs, but other fascinating creatures roamed the Earth at the same time. Learn about lesser-known animals from the prehistoric era that are no less fascinating! Students will be engaged in reading about ancient animals like Gigantopithecus, Titanoboa, Megalodon, and more as they develop their skills at reading and writing numbers. This nonfiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, intriguing sidebars, practice problems, and math diagrams make...

Un libro claro, riguroso y estructurado, adaptado a los contenidos curriculares de Ciencias de la Naturaleza de 2o de ESO acompañado de un elevado número de actividades teóricas, prácticas, competenciales e interactivas. Destaca por tener un enfoque hacia las nuevas tecnologías, con vínculos a animaciones y a actividades interactivas. Y por tener un planteamiento encaminado al trabajo de las competencias básicas.

En la corte cordobesa del califa Al-Haken ii se ha producido un terrible suceso: Sudri, el eunuco favorito del califa, ha aparecido muerto.Todos los indicios apuntan a un joven mozárabe, Rodrigo, como único culpable; sin embargo, el médico Hantal Idrissi y su hijo comenzarán una investigación que destapará traiciones, odios y venganzas. Una novela de intrigas enclavada en el ambiente de la Córdoba califal.