Desafíos matemáticos

This fascinating narrative gets under the skin of the world’s tallest buildings! How many people are involved in creating a skyscraper? What environmental factors come into play? What does it take for a skyscraper to function? All these questions and more will be answered as we visit the skyscrapers from New York to Malaysia to China. Students will gain a deeper understanding of skyscrapers and how they shape our world.

Insectos 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.

El libro analiza el tema en dos partes diferenciadas y complementarias. A la primera corresponde la descripción de los planteamientos estilísticos del Romanticismo, mientras que la segunda aborda las cuestiones que afectan de forma más amplia a la comprensión romántica del la obra de arte. La articulación entre los aspectos teóricos e históricos de la época, el análisis de las cuestiones polémicas, el debate,implícito o explícito en el seno del reciente desarrollo historiográfico, son algunos de los rasgos que caracterizan a este libro, aportación original al estudio del...

“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 horned dinosaurs face-to-face: Torosaurus had the biggest skull of any animal ever! Pentaceratops had five sharp horns on its head! Styracosaurus was as big as an ice cream truck! Plus, you'll get to know Centrosaurus,...