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

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.

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.

¡Hay nieve en el suelo, y los carámbanos se están formando! Debe ser invierno. A través de fotografías de color descubra qué tipo de actividades la gente hace en el invierno. Las preguntas de pensamiento crítico y otras grandes características hacen que esta edición en español sea una excelente introducción a la lectura de no ficción para niños. There's snow on the ground, and icicles are forming! It must be winter. Through vivid full-color photographs and carefully leveled text, discover what kinds of activities people do in the winter. Age-appropriate critical thinking...

La industria aeroespacial es la segunda actividad más normada luego de las activi- dades nucleares; está regida por infinidad de normas, reglamentaciones, directivas, documentación específica y todo tipo de manuales de referencia obligatoria. La gran mayoría llega a manos de usuarios, operadores, talleristas, etc. en idioma in- glés, el idioma de uso aeronáutico por naturaleza. A ello se suma el hecho de que la industria aeronáutica no está aislada de las actividades humanas, sino que inte- ractúa, se nutre y hace su aporte a ellas creando la necesidad de un sólido...

When we look up at the night sky you can see millions of stars, but what do you think we could see in space if we left Earth? If we could hop into a special ship and blast off, traveling billions of miles away from Earth, we’d see the Milky Way galaxy. In this book, readers take an incredible journey through that galaxy, exploring the universe and learning how it was formed and what will one day happen to these enormous groups of stars. From mysterious dark matter to the black holes at the center of galaxies, readers will also dive into the mysteries of the universe scientists have spent...

Healthy Habits is a collection of four stories featuring the Chiminis, fictitious characters that live in the forest and are as small as pine cones. In each story, one of the Chiminis has an adventure that highlights the importance of hygiene, a good diet, and exercise, and offers general health advice.