La cebra

There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. With the help of this understandable book, even struggling readers will grasp this cycle of nature. Low-level language, fact boxes, and an extended glossary provide readers with essential vocabulary explanations that allow them to further understand each step of the cycle. Full-color diagrams aid readers' comprehension as they move through the cycle from start to finish, and then around again.

A land of extremes, from active volcanic peaks to dense rain forests, Guatemala has sustained great civilizations and attracted foreign conquerors. While shadows of its vicious, decades-long civil war still linger, Guatemala's people work toward peace and stability in the face of corruption and impunity. Illuminating photographs, insightful facts, and informative sidebars help the reader discover what it's like to live in today's Guatemala, its ancient beginnings, dramatic landscape, rich culture, resilient people, and more.

Este libro educacional cuenta la historia de una chica en busca de la respuesta a una gran pregunta: ï¿1/2Por quï¿1/2 el agua vale la pena? Enfrascada en su libro, llevarï¿1/2 a los jï¿1/2venes lectores a travï¿1/2s del mundo del agua limpia, su gestiï¿1/2n y la importancia de todos los que trabajan juntos para mantenerla. Escrito para un pï¿1/2blico entre 4 y 8 aï¿1/2os, busca atraer tambiï¿1/2n a lectores de todas las edades. Este libro emplea divertidas ilustraciones y un texto en rima para dar una explicaciï¿1/2n simple de un complejo proceso, a la vez que anima a...

Bernardino de Sahagún recopiló un inmenso caudal de datos que conforman la edición de su Historia general de las cosas de la Nueva España. En estas páginas, extraídas de aquella monumental obra, se muestran las supersticiones y convicciones, los días y sus significados entre los antiguos mexicanos.