Los impactos sociales: guía de campo

Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

Consta de 6 episodios más el introductorio en los que se ofrecen una amplia variedad de ejercicios y actividades. Asimismo, incluye una Referencia gramatical en la que quedan sistematizados los contenidos gramaticales correspondientes a Primer Plano 3. Esta sección se ha elaborado atendiendo a los requisitos establecidos para el nivel avanzado por el Plan Curricular del Instituto Cervantes y las descripciones del nivel B del Marco Común de Referencia Europeo.

Some people are afraid of mice, but these tiny critters are full of interesting facts. Through both English and standard Latin-American Spanish, learn how little mice are taken care of and how some of these itty bitty animals are even kept as pets or used to run tests. From tiny pink pups to wild mice invading your home, these animals will help readers learn definitions and early concepts with the use of full-color pictures and a great picture glossary. Strong picture-text correlation aids in comprehension Reading level supports beginning readers Picture glossary helps develop vocabulary...

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.