Energía del viento

Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

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

Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

Invierno, primavera, verano y otoño--las estaciones son uno de los ciclos más familiares de la naturaleza. Pero, ¿por qué cambia el clima? Aprenda por qué los patrones climáticos cambian a lo largo de las estaciones. Winter, spring, summer, and fall--the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

The Concept Of The Cube Is Defined Through Interesting Text And Photos Displaying How Cubes Can Be Found Throughout Our World.

Texas has had some extraordinary people. This book covers some of them, such as Melinda Gates, astronaut Shannon Walker, and Bessie Coleman, the first African American female pilot. Age-appropriate text teaches readers about Texas's most important movers and shakers, while historical and contemporary images reinforce the book's key concepts.

¡La ciencia como nunca antes la has visto! Cargada de impresionantes imágenes en 3D, ¡Ciencia! muestra los fundamentos de la ciencia con un detalle asombroso: desde las partículas atómicas hasta la metamorfosis. El texto claro y autoritativo explica conceptos complejos de manera sencilla: desde la gravedad al ADN, pasando por los estados de la materia. Esta enciclopedia es el regalo perfecto para niños a partir de 9 años y una ayuda indispensable para el aprendizaje en el hogar de toda familia.