Ondas sonoras y la comunicación (Sound Waves and Communication)

This volume offers a concise overview that's perfect for young readers who are just learning about economics. A basic overview of supply and demand breaks down the concept with clear explanations of each aspect, using concrete examples to which readers of the focus age group can relate and understand. Vibrant illustrations help reinforce the text, and pertinent vocabulary is highlighted in bold boxes or in the glossary. Questions throughout help readers put the ideas into context. This lively text keeps readers engaged and turning the pages.

Libro escrito en formato diccionario que recopila lo mejor de la moda de las últimas décadas. Haciendo un recorrido por el mundo, se explican los diseñadores, las firmas, las ciudades, las tendencias y los iconos que han marcado un hito en el inicio del siglo XXI. La moda se transforma, cambia, evoluciona, se reinventa y, en este libro digital, los periodistas de moda Oriana Godoy y Yamid Zuluaga seleccionan aquello que deben saber los amantes de la moda en cuanto a conceptos y actualizaciones.

What is the most effective way to study for a test? Whether it's gearing up for the SATs or cramming for a history exam at school, this book is here to help. Packed with results-driven recommendations on everything from time management to reducing stress, it provides students with the tools they need to develop more efficient study habits and boost their grades. Indispensable sidebars are included throughout, as are suggestions for how to apply essential test-prep skills in the workplace and beyond.

George Washington Carver was a skilled botanist who became famous for his work with peanuts and other plants. Readers will discover the captivating life of this incredible scientist in this engaging scientific biography translated in Spanish. Using colorful photos and graphs, children will learn why Carver was known as "The Plant Doctor" as a child and how his work with peanuts, sweet potatoes, and pecans helped change the way people used plants! The helpful glossary and index aid in better understanding of the content, while a simple, interesting experiment leaves Spanish-speaking children...