Exploremos las rocas sedimentarias (Exploring Sedimentary Rocks)

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.

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 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.

Un joven Rubén de 14 años recibe una propuesta para ingresar en una escuela de alto rendimiento donde podrá profundizar su formación en el campo de la programación y los videojuegos, actividades que le entusiasman. La oportunidad es extraordinaria y el joven gamer está dispuesto a aprovecharla al máximo. Sus compañeros - Verkan, Oli, Robin, Flynn -, las materias que ha de aprender, los profesores..., al principio todo resulta enormemente atractivo. No obstante, enseguida se presentarán algunas situaciones misteriosas y no todas las cosas cuadran. Las sospechas de que la escuela...

Alguien está dando muerte a los Cazadores de Sombras del círculo de Valentine, y esas muertes enemistan de nuevo a los Cazadores de Sombras con los subterráneos. Sólo Simon, ahora convertido en vampiro, podrá evitar el enfrentamiento. Mientras, Clary y Jace descubrirán un misterio que les llevará a fortalecer su relación o... a destruirla para siempre.

How do you truly engage students in learning history? When students make personal connections to the subject, they're much more motivated to learn. This Spanish book provides firsthand accounts of history that give personal insights into historical events. Introduce students to California's early settlers including John Bidwell, Jim Beckwourth, Jedediah Smith, Sarah Royce, Charley Parkhurst, Kit Carson, the Donner party, and more. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need ...

Learn how to create various sculptures out of different materials. Includes instructions for making a sculpture of a tree.