Tu revista literaria de novedades y clásicos [ EPUB, PDF, MOBI ]
What would happen if the Moon disappeared? We would try every possible way to get it back. As in everyday life, this book shows us that the answers to our problems are sometimes so close we just can't see them.
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Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!
¿Te gustan las búsquedas del tesoro? ¿Cómo sabes si el agua de un arroyo está limpia y saludable? Acompaña a Lucas y a su hermana mientras hacen de científicos en búsqueda de ciertos tipos de insectos de arroyo (macroinvertebrados acuáticos) que necesitan agua limpia y libre de contaminación para sobrevivir. ¿Qué encontrarán al voltear piedras, levantar hojas y buscar entre el lodo? Sigue leyendo para saber si su arroyo recibe una calificación de aprobación.
This book describes the process of plant growth through vocabulary rich text and descriptive photographs. Readers will explore a plant as it grows from a seed to a tall plant in the sun.
The values and traditions of Mexicans at home, school, and work are explored as well as how life differs in urban and rural settings.
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