Exploremos el ciclo de la roca (Exploring the Rock Cycle)

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.

Go for the goal with this text, which examines fascinating female sports heroes who’ve proved to the world that gender is no barrier to athletic success. Readers will delight in learning about the lives of Mia Hamm, Wilma Rudolph, and the Williams sisters, as well as other important women who’ve broken barriers in sports. Readers will be inspired to pursue a career in athletics after learning about how others have achieved success in spite of great obstacles. The biographical nature of the text supports social studies curricula, and fact boxes and a comprehensive timeline provide...

El mundo natural es un lugar extraño donde ocurren las cosas más insólitas y sorprendentes. Récords, curiosidades y extravagancias reunidas por temas: botánica, animales salvajes, domésticos, acuáticos, reptiles, insectos, aves, dinosaurios y fenómenos naturales, para enterarse de que el sauce enano no pasa de los 6 cm de altura, que los dientes del hipopótamo pueden llegar a medir medio metro, que el camello puede beber hasta 150 litros de agua de una sola vez, que el cocodrilo puede aguantar la respiración bajo el agua una hora... ¡lee y descubre!

Discover the military personnel that guard our skies, the aircraft that they use and the high-tech equipment.

No conseguir lo que deseas puede ser malo, pero conseguirlo puede ser peor. Y es que hay deseos que empiezan como un sueno y al hacerse realidad se convierten en pesadillas. Ana tiene dieciseis anos, quiere ser brillante, popular y atractiva. Y, por desgracia para ella, lo consigue. "C2BFQuieres" formular tres deseos? Meditalos bien y ...cuidado con lo que deseas porque pordrias conseguirlo.