¿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.

From the Carnival celebration in Ponce to El Yunque National Forest, there's a lot to see and do in Puerto Rico. This island territory lies in the Caribbean. Puerto Rico introduces the state's history, geography, climate, economy, people, and places. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.

Alexander Graham Bell was always trying to invent new things! In this biography that has been translated into Spanish, readers will learn about Alexander's life as a teacher and inventor of such incredible inventions as the telephone, record player, and metal detector. Colorful images, supportive text, an interesting timeline, and a helpful glossary, table of contents, and index combine to give readers an inspiring look into the life of Alexander Bell.

La edición que aquí presentamos del Romancero gitano contiene todos los elementos necesarios que permitirán al estudiante entender la obra de Lorca en su sentido más amplio: una completa introducción que contextualiza al autor en su marco histórico-cultural y en la Generación del 27; un análisis de su obra, prestando especial atención a la imagen poética, y todos los elementos característicos de la colección que convierten a este volumen en una iniciación perfecta en el estudio de la fascinante obra de un magistral autor de nuestra literatura.

Lánzate a la aventura con Spidey, Ghost-Spider y Miles mientras luchan contra el Duende Verde, Doc Ock y Rhino, y se alían con fantásticos amigos como Pantera Negra, Hulk y Ms. Marvel. Mi primer cómic es una serie hecha para niños entre 5 y 8 años, ya sean lectores independientes o principiantes. Estas historias cuentan con textos sencillos, viñetas claras y entretenidas historias sobre sus personajes favoritos