Cómo podemos utilizar la palanca?

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

Defines screws, 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.

Tu Familia: La historia de un chico nacido por donante, es un libro ilustrado dulce y alegre que responde a la pregunta "¿de dónde vengo?" y luego introduce amablemente los conceptos de medio hermanos y los donantes de una manera abierta y honesta.

Got a fan of snakes, lizards, and turtles? Dig into this beginner's guide to reptiles from Cathryn and John Sill, creators of the award-winning About... series. Author and educator Cathryn Sill explains in simple language the basic characteristics that all reptiles share, while offering a look at many of the animals that fall into this diverse category, including ever-popular lizards, snakes, and turtles. The beautifully detailed paintings of noted wildlife illustrator John Sill depict reptiles in their habitats and highlight their unique aspects. An afterword provides more detail on each...

Laurence cuenta su vida al lado de su madre (alcohólica y con intentos suicidas) y su medio hermano Jay. Han huido durante nueve meses de los Servicios Sociales ingleses, que consideran que tanto su hermano como él estarían mejor bajo la tutela del Estado. Les presento a Laurence, tiene quince años y mide más de 1.80. Muy pronto, deberá usar la ropa de su mamá y hacerse pasar por su difunto padre en la radio. Laurence Roach sólo quiere tener una vida normal, pero eso no es nada fácil pues su madre es una alcohólica depresiva que todas las noches bebe más de la cuenta. Para mantener ...

California became a territory in the United States when the Treaty of Guadalupe Hidalgo was signed in 1848. That treaty ended the Mexican War. Several days before its signing, gold was discovered at Sutter’s Mill in what is now Sacramento. The non-Native population of the territory was less than one thousand in 1848, but the gold rush increased that number to one hundred thousand by the end of 1849. The gold rush not only made many people wealthy, it brought ecologic devastation while speeding up California’s statehood. This book richly explores this interesting history.