Energía del viento

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

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

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

Teaches Young Readers About Shapes And Patterns Using The Seasons Of The Year And Pictures Of Nature.

When we look up at the night sky you can see millions of stars, but what do you think we could see in space if we left Earth? If we could hop into a special ship and blast off, traveling billions of miles away from Earth, we’d see the Milky Way galaxy. In this book, readers take an incredible journey through that galaxy, exploring the universe and learning how it was formed and what will one day happen to these enormous groups of stars. From mysterious dark matter to the black holes at the center of galaxies, readers will also dive into the mysteries of the universe scientists have spent...

Seventy-two of the best-known stories about God and his people including creation, Noah's ark, Jonah and the big fish, Christmas, Easter, and Jesus' parables and miracles.

Chuma está raro... Y no es porque tenga un solo ojo (¡y de color amarillo!) ni por sus cuernos, ni siquiera porque se comunique con gruñidos... Está raro porque no encuentra a sus amigos: ¿dónde se habrán metido el perro invisible, Barto el Lagarto y Marina la Bailarina? En este libro-disco, además de ayudar a Chuma a reunir a su pandilla, ¡podrás bailotear con canciones muy molonas!