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

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.

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.

En una edad de tinieblas, donde la vida cotidiana discurre a menudo entre hechizos y ensalmos, cualquiera puede pasar por brujo. La sabia ironía de Ángeles de Irisarri conduce estas seis Historias de brujas medievales, uniendo a su proverbial sentido del humor la construcción de un universo propio en el que las a veces mal llamadas brujas no dejan de ser mujeres de carne y hueso.

Learn how to greet others politely! This Spanish nonfiction book covers a variety of greetings and farewell gestures that students can use in everyday life. Perfect for young readers, this book also includes a short fiction piece related to the topic, a b

Colorful photographs feature children on their way to school, in their classrooms, and following school rules. Young readers will also learn about the jobs of teachers, librarians, and principals. An important section teaches children how to stay healthy inside their school communities.

In AD 79, the residents of the booming Roman city of Pompeii were shocked when a nearby mountain exploded, releasing superhot ash, rock, and gas on the surrounding areas. What happens next is the extraordinary account of a volcano in action. Though the people who didn't flee Pompeii were doomed, the volcano preserved their remains, allowing us to better understand a fascinating time in the Roman Empire. Astonishing photographs of Pompeii, primary source records of the occurrence, and riveting text are just some highlights of this high-interest volume.