Exploremos las rocas sedimentarias (Exploring Sedimentary Rocks)

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.

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.

Victor Domínguez, vicerrector de la Universidad Madrileña de Educación a Distancia muere de forma violenta cerca del estadio. Todo parece indicar que el crimen está relacionado con su actividad profesional. Un asesino en el rectorado retrata con ironía y crudeza la vida universitaria en una España instalada en el inicio de la crisis económica.

Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to page, what a fish is unfolds in vocabulary call-outs, insightful questions, and relatable...

Tu Familia: La historia de un chico nacido por donante, es un libro ilustrado dulce y alegre que responde a la pregunta "¿de dónde vengo?" y luego introduce amablemente los conceptos de medio hermanos y los donantes de una manera abierta y honesta.

Chuma está raro... Y no es porque tenga un solo ojo (¡y de color amarillo!) ni por sus cuernos, ni siquiera porque se comunique con gruñidos... Está raro porque no encuentra a sus amigos: ¿dónde se habrán metido el perro invisible, Barto el Lagarto y Marina la Bailarina? En este libro-disco, además de ayudar a Chuma a reunir a su pandilla, ¡podrás bailotear con canciones muy molonas!