Energía del viento

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

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

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

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

Nací cuando mis padres ya no se querían", recuerda Adriana, mucho después de que todo haya sucedido. Por ello, la niña se crea un paraiso propio, poblado por amigos imaginarios y una familia de su elección. Esta felicidad a medida se ve perturbada cuando Adriana debe iniciar el periplo escolar y entrar definitivamente en el mundo de los adultos, un entorno que le resulta ajeno cuando no hostil. Sin embargo, siempre queda un refugio bajo las relucientes estrellas escondidas en los cristales de la lámpara del salón.

Describes the life and work of the scientist who was persecuted by the Inquisition for his views of the universe.

A lot of what many people know about the native groups in the northeastern part of North America comes from colonial history. The Wampanoag met the Puritans as they made their home at Plymouth. The Powhatan group of the Algonquin people had a large role in the history of the Jamestown Settlement in Virginia. However, the history of the native groups living in modern New York, Massachusetts, Ohio, Pennsylvania, Maine, and northern Virginia began long before European settlement! Readers meet several individual groups of native peoples and explore the distinguishing features of northeastern...

Más de 150 fotos y textos sencillos para descubrir de dónde salen los alimentos que compramos en las tiendas.