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

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.

Este libro interactivo, magníficamente ilustrado por Fernando Vicente, acerca a los jóvenes lectores al mundo fascinante y misterioso del antiguo Egipto. Cada doble página es una visita privilegiada a un escenario lleno de magia: la orilla del río Nilo, un mercado de la ciudad de Tebas, la galería de los dioses egipcios, las pirámides, las tumbas de los grandes faraones, y un puñado de juegos y enigmas para aprender y divertirse.

Alice va al último curso en el instituto. Sólo le quedan unos exámenes y podrá presentarse a la selectividad. Mientras, a su alrededor ocurren cosas nuevas, excitantes y desconocidas: el primer amor, la primera vez... Es difícil ser adulto y aprender a ser uno mismo... Además, en su casa las cosas no van muy bien, su padre viaja constantemente por motivos de trabajo, aunque Alice sospecha que hay algo más. El mundo de los adultos es un caos y el suyo también, y encima no parece haber nadie que la ayude a contar las estrellas. Carlo es de los que se sienta siempre en la última fila,...

Universo is one book in the Spanish-language Gran Atlas de la Ciencia series that covers today's most popular science topics, from digital TV to microchips to touchscreens and beyond. Perennial subjects in earth science, life science, and physical science are all explored in detail. Amazing graphics--more than 1,000 per title--combined with concise summaries help students understand complex subjects. Correlated to the science curriculum in grades 5-9, each title also contains a glossary with full definitions for vocabulary.

“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...