Exploremos las rocas metamórficas (Exploring Metamorphic Rocks)

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.

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.

Cuando llega la hora de dormir, ¡los monstruos tienen miedo! Y todos quieren meterse en la cama de Joaquín. Pero Joaquín está muy incómodo y no puede dormir con tanto monstruo miedoso en su cama.

Discusses the natural process of decay in nature's life cycle, as well as how we can speed along the cycle of decay for man-made products.

Al examinar las Autonom-as espaolas, lo primero que llama la atencin es que han multiplicado el nmero de pol-ticos y de funcionarios necesarios para que funcione -aunque sea mal- el mastodntico Estado autonmico. El principal inconveniente de la autonom-a territorial es su alt-simo coste, no siempre justificable, que se agrava porque la falta de control estatal facilita los despilfarros de los gobernantes de las CC.AA., quienes acaban financindose con una deuda pblica que ha llegado a ser inasumible, y que pone en peligro tanto la supervivencia de la propia autonom-a territorial como la...

Centrada en el ambiente de una pequeą ciudad sureą y en un grupo de personas que- en torno a la figura emblemt̀ica del sordomudo John Singer, el personaje ms̀ conseguido de esta genial autora- tienen en comn︢ la esencial soledad, su marginalidad y el rechazo de una sociedad que les ignora.