Arizona, el Estado del Gran Cañon

La lluvia es un fenómeno atmosférico que consiste en la precipitación de gotas de agua. La intensidad de las lluvias se mide en milímetros de agua caída, es decir, la altura de agua caída recogida en una superficie plana y medida en milímetros. Un milímetro de agua de lluvia equivale a 1 litro de agua por m2, que es otra forma de medir la cantidad de agua de lluvia. Muy pronto va a llover y los niños están listos para explorar y averiguar todo lo que ocurre cuando las negras y amenazantes nubes se juntan. ¿Te has detenido a pensar de dónde viene la lluvia o adónde va?, ¿cómo se ...

Universo is one book in the Spanish-language Gran Atlas de la Ciencia series that covers today's most popular science topics, from digital TV to microchips to touchscreens and beyond. Perennial subjects in earth science, life science, and physical science are all explored in detail. Amazing graphics--more than 1,000 per title--combined with concise summaries help students understand complex subjects. Correlated to the science curriculum in grades 5-9, each title also contains a glossary with full definitions for vocabulary.

In 1846, travelers heading for California became trapped high in the mountains of the Sierra Nevada. Snowdrifts surrounded their shelters, and food supplies dwindled. How they stayed alive remains one of the most gruesome stories in US history. However, some facts that have come to light recently through archaeological digs will surprise even those who think they know the story. This gripping book, including maps and images of the era, tells the true account of the doomed Donner party.

Presents a collection of poetry and lullabies by a number of Colombian authors and poets including Jose Silva and Eduardo Castillo.