¿Por qué hibernan los animales? (Why Animals Hibernate)

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.

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.

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.

Un travesti ha sido asesinado y su cuerpo aparece con el rostro desfigurado. Quizá otra víctima anónima para el registro de crímenes sin resolver. Pero el comisario veneciano Guido Brunetti, obedeciendo a su infalible instinto, descubre que ese hombre vestido de mujer es Leonardo Mascari, director del Banco de Verona y respetable ciudadano en Venecia. Podría ser un simple caso de doble vida para uno que frecuentaba los circuitos de prostitutas y travestidos, pero los indicios delatan que hay algo más en esta nueva e intrigante historia de Donna Leon. Su personaje, el comisario Brunetti, ...

En este libro el autor revela cómo Dios ha de valerse de los creyentes jóvenes para que se produzca un avivamiento mundial. Halle la inspración que necesita para ayudar y alentar a la próxima generación a medida que entiendan y acepten la divina cita con su destino.

Book Features: • Ages 4-8, Grades PreK-2 • 16 pages, 8 inches x 8 inches • Simple, patterned Spanish text with full-color pictures • Includes comprehension questions, writing prompts, and high frequency words • Graphic organizers and photo glossary included Jump Into Learning: In Listos para las Ciencias: Puedo Saltar, preschoolers—second graders learn about the different types of animals that can jump, just like you! Science Made Fun: How high can you jump? These animals can jump, too! Young readers learn about some of their favorite animals that can jump, hop, and leap! Build...

Ámbar y Azul, dos gemelas curiosas (aunque, a veces, demasiado graciosillas), emprenden un intrépido viaje en busca del misterioso ADN en compañía de Pío, un pollito sabio que conoce las respuestas a todas las preguntas. Los tres protagonistas se vuelven de tamaño microscópico y exploran una célula habitada por represores insufribles, ribosomas novatos, proteínas todoterreno y otras moléculas divertidas y estructuras celulares que ejercen un papel clave en los procesos que constituyen los fundamentos de la genética.