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

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.

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.

Colección de cuadernos independientes de los cuatro cursos de Secundaria. Para trabajar y consolidar todos los contenidos de la ESO de acuerdo a las necesidades de cada alumno.

Una novela negra repleta de acción que retrata la Barcelona más oscura en tiempos de crisis. Ruth Santana es una joven desahuciada y pluriempleada que vive en el umbral de la pobreza para pagar lo que considera su deuda con los bancos. Vive en una ratonera insalubre y desde hace unos meses espera a la salida de los supermercados para coger pan o yogures. Por alguna razón que ni ella misma comprende, sigue luchando. Una noche, un desconocido le hace una oferta. Quiere que le ayude a reventar cajeros automáticos. El hombre le ofrece dinero rápido para pagar su deuda con el banco y volver a ...

Si quieres regresar a los días en los que usabas pantalones deslavados, pulseras de goma, vestías sacos con hombreras, coleccionabas vasos de refresco, formabas tu ficha en las maquinitas y regresabas los casetes con una pluma, compra este libro. Y cuéntaselo a quien más confianza le tengas.

“Dino” Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children’s books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these duck-billed dinosaurs face-to-face: Corythosaurus could honk through the top of its head! Gryposaurus had hundreds of grinding teeth! Parasaurolophus could smack enemies with its strong tail! Plus, you'll get to know...