¿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.

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

A través de una narración amena y directa intercalada con algunos de los poemas más conocidos de Federico García Lorca, Concha López Narváez acerca a los primeros lectores la vida y obra de uno de nuestros poetas más universales. Desde su nacimiento en Fuente Vaqueros y primeros años de vida, la autora recorre los paisajes y las personas que configuraron su carácter y su personal visión del mundo, hasta su época de reconocimiento mundial y posterior muerte en 1936.

Este libro pretende contar la historia del I Duque de Lerma, don Francisco de Sandoval y Rojas (1553-1625), que llegó a ser un dos españoles más poderosos de su tiempo. Hombre de confianza de Felipe III, era en realidad el verdadero gobernante del reino. Nacido en una familia al servicio de la Corona, pero sin recursos económicos, logró amasar la fortuna del momento y controlar tal cantidad de oficios que perdió. Hubo numerosas voces que se levantaron contra él, entre ellas la de la propia reina.

Wildlife plays an important role in the environment. With the help of this engaging volume, readers of many ages and levels will learn all about many of the fascinating animals that inhabit the planet. They will find out what makes an animal an animal. They will also learn fun facts about some of their favorite creatures. Eye-catching photographs correlate closely with concise, accessible text that supports elementary life science curricula. A must-have for animal lovers, this informative book will be a popular addition to your collection.

Robbery, gunfights, murder--outlaws ran rampant all across the Wild West! Readers will be introduced to some of the most famous robbers and outlaws of the Wild West in this enthralling, Spanish-translated nonfiction title. With vivid images, informational text, and incredible facts and stories about such well-known figures as Billy the Kid, Butch Cassidy, and Jesse James, readers will be engaged from cover to cover!