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.

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.

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.

Primero fue el Big Bang. Despus se form nuestra galaxia. Ahora vamos todos lanzados a travs del espacio a la velocidad de la luz, junto con billones de otros planetas, estrellas, satlites, meteoros, cometas, asteroides, meteoritos y Dios sabe cuantas cosas ms.Este asombroso libro te proporciona informacin minuciosa de nuestra galaxia y mucho ms all. Saltars de excitacin al hacer una gran gira por el sistema solar, donde esquiars en Marte y conocers al triste compaero de Plutn. Te dejarn sin aliento algunos datos increbles acerca de gigantes rojas, enanas blancas y supernovas. Adems,...

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