Crisis energética: El futuro de los combustibles fósiles (Energy Crisis: The Future of Fossil Fuels)

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...

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. They’ll 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. Don’t worry, they’ll be happy to learn that (hopefully) we have millions of years left!

A doble página siempre encontramos una imagen en la página derecha y una breve pregunta en la página izquierda que presenta alguna relación con dicha imagen. No se trata de un libro da adivinanzas, se trata de un juego de preguntas visuales, de respuesta libre, en el que un adulto puede estimular la capacidad de observación y creación de los más pequeños.

A bilingual vocabulary book features hundreds of vocabulary words arranged by themes, with labeled objects and actions common to the experiences of young children. Simultaneous.

¿Regalas detalles de San Valentín a tus familiares o amigos? Aprende acerca de esta celebración de amor y descubre cómo la gente muestra su afecto en este día especial. Las fotografias llenas de color y el texto cuidadosamente organizado en niveles hacen de este ejemplar una útil introducción a este día especial. Las preguntas de pensamiento crítico a nivel apropiado ayudan a desarrollar habilidades de lectura informativa. Do you give valentines to your friends or family? Learn about the holiday of love and find out how people show their affection on this special day. Full-color...