Cómo cambia el agua (How Water Changes)

This book describes dump trucks called off-highway trucks, explaining their operating equipment and dumping beds, fuel, and jobs.

A dictionary tailored for the Latin American market is an ideal supplement to the middle school curriculum and includes up-to-date definitions, example sentences, synonyms and antonyms, and more. Original.

In an online world where the amount of information seems to increase exponentially even week to week, student researchers can find it an ever-greater challenge to distinguish credible, vetted content from hearsay and misinformation. This book on citing internet sources will help them determine which online sources are trustworthy and which are not. Its lively and engaging instructional tips will help readers successfully negotiate the vast landscape of information out there. They will produce quality research for papers now and beyond in their academic careers with skill and confidence.

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...

¿Por qué somos más altos por la mañana que por la noche? ¿Con qué sueñan los ciegos? ¿cómo se mide la altura de las montañas? ¿Cómo se forma un nudo en la garganta? ¿Cómo sería la Tierra sin la Luna? ¿Por qué a veces se nos pega una canción? ¿por qué las olas siempre llegan a la playa en línea recta? ¿Beben agua los peces? Este sorprendente y divertido libro reúne las respuestas a 70 curiosas preguntas sobre nuestro cuerpo, el mundo animal, las plantas, la ciencia, la tecnología y otras inquietudes o dudas que todos hemos tenido alguna vez.