El queso y los gusanos

¿Sabías que el mismo viento que te revuelve el cabello puede usarse para generar energía? Pero, ¿cómo exactamente se aprovecha el viento? ¿Y cuál es el efecto sobre el medioambiente? Lee este libro para aprender todo sobre la energía eólica. Did you know that the same wind that messes up your hair can be used to create energy? How exactly do you harness the wind? And what is the effect on the environment? Read this book to find out all about wind energy.

Este libro consta de diez unidades didácticas, cada una de las cuales se estructura de la siguiente manera: - Doble página de apertura - Desarrollo de contenidos - Dossier - Síntesis - Actividades complementarias. El contenido está especialmente adaptado para la Comunidad Autónoma de Andalucía.

In the 1800s, a Choctaw girl becomes friends with a slave boy from a plantation across the great river, and when she learns that his family is in trouble, she helps them cross to freedom.

With simple examples that are easy to relate to, this basic review of some of the building blocks of economics will help readers easily grasp the concepts. With language that is conversational without being too casual, readers are engaged throughout as they learn about not only these basic concepts but how they fit into the whole economic scheme of things, such as where goods come from. Readers will learn about the three factors of production, as well as what happens when resources are lacking and how that influences the entire economy.