El gran llibre del planeta

¿Te atreves a entrar en el Laboratorio de Plagas de este libro? Aquí estudiamos la historia de las enfermedades más terribles. Si te contagias de alguna, te pondrás enfermo. O peor aún. Muchas de esas enfermedades peligrosas se propagan rápidamente, y entonces miles de personas enferman y mueren: es lo que llamamos una epidemia o plaga. Pero... ¡no te asustes! También estudiamos las soluciones para erradicarlas y te presentamos los tres tipos de gérmenes (los protistas, las bacterias y los virus) y cómo combatirlos. La repugnante historia de enfermedades mortales, explicada por las...

La obra se compone de un selecto conjunto de documentos históricos y comentarios de historiadores, organizado y sistematizado por el autor. Naturalmente, toda la documentación se refiere al período dominado por la figura de Oliver Cromwell y la institució

Computer science is all around us, at school, at home, and in the community. Anyone can learn computer science, even at the elementary school level. This book delves into essential computer science concepts using age-appropriate language and colorful images. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience. The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.