George Washington Carver

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

Este texto se adapta a un curso completo de Modificación de la conducta, recogiendo en esta 8a edición los últimos estudios relacionados con esta área. Se han añadido capítulos completamente nuevos en el campo de las nuevas técnicas de motivación. En total el texto presenta un 2 por ciento de material nuevo y el resto del libro ha sido reestructurado por completo para darle un mayor enfoque pedagógico y aplicado. | Desarrolla, de forma gradual, la capacidad del estudiante para analizar e interpretar el análisis de datos. También se han actualizado los ejercicios y actividades que...

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. Theyll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Dont worry, theyll be happy to learn that (hopefully) we have millions of years left!

Simple text and photographs introduce the animals of the Arctic, grouped to provide practice in solving easy addition problems.