Diccionario Pop de la Moda del Siglo XXI

Un nuevo formato para la serie middle grade de ciencia más divertida. Pachi y su papá científico vuelven con una serie de aventuras que surgen a partir de preguntas raras. ¿Es posible fabricar un gas desde cero?, ¿el agua salada pesa más que el agua dulce? Descubre las respuestas a estas superinterrogantes de la manera más divertida: ¡con experimentos! Y la mejor parte es que puedes convertir tu casa en un laboratorio con cosas que de seguro tienes en la despensa.

Más de 15.000 especies de plantas y animales están en peligro de extinción. Este atlas enciclopédico muestra las razones de esta desaparición y presenta algunas de las medidas que están tomando diversas organizaciones para evitarlo.

Readers will learn about the important relationship between producers and consumers as well as buyers and sellers and how they all work together to create a healthy economy. This instructive volume defines basic economic concepts like goods and services and explains production with examples of the different types of production. It also covers the primary and secondary industries that produce goods. Concepts such as marketing and advertising are also covered, for a well-rounded view of this fascinating aspect of the economy.

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This Spanish-translated book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, who works against it, and all other forces that contribute to a successful dive or climb. After reading this Spanish-translated book, readers can decide if they will ever be interested in engaging in one of these extreme sports.