Energía del viento

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Solar Energy Is Explained. Included In This Book Is Where It Comes From, Who Uses It, And The Positive And Negative Benefits Of Using It. Correlated To Common Core, Texas TEKS, Virginia Sols, And Georgia Performance Standards.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

Defines screws, explains their functions, and suggests simple experiments to demonstrate how they work.

El autor y el ilustrador de Los Futbolísimos presentan una nueva serie: Los Forasteros del Tiempo. Todo empezó, como casi siempre ocurre, un día normal y corriente. Habíamos ido al hiper de mi barrio a comprar unas bicis. Mi padre, mis dos hermanos y mi vecina Mari Carmen con su hija María. Seis Kawasakis 3 W2, preciosas, rojas, relucientes. Estábamos en mitad del parking, subidos en nuestras bicis, preparados para pedalear, cuando de repente ocurrió: un ruido en el cielo, un tremendo resplandor blanco, un rayo que cae y de pronto... estábamos en el Black Rock. En el corazón del...

This book is composed of poems-tribute to some bars (and, by extension, to their owners or regents, some of those bars have already disappeared, others have changed owners or regents and others remain) that they have supported for 29 years with their obols.

From the largest cargo planes and passenger jets to the smallest of single-engine crafts, airplanes are modern marvels. But just how do people build planes and what keeps them safe in the air? This exciting book takes readers inside the hangars where bolts and metal are turned into winged creations ready to take people all around the world. Amazing photographs show the aircraft construction process step-by-step, while engaging text gives a strong technical explanation of the science at work during every flight in this innovative STEM book.

Now in a Spanish-language edition! “A must-read for a deeper understanding of a well-connected genius who enriched the cultural road map for African Americans and books about them.” — Kirkus Reviews (starred review) Amid the scholars, poets, authors, and artists of the Harlem Renaissance stood an Afro–Puerto Rican named Arturo Schomburg. This law clerk’s passion was to collect books, letters, music, and art from Africa and the African diaspora and bring to light the achievements of people of African descent through the ages. A century later, his groundbreaking collection, known as...