Proyectos reales para explorar la Primera Guerra Mundial y los años 20 (Real-World Projects to Explore World War I and the Roaring ’20s)

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...

Este texto de la colección "El juego de la ciencia" tiene por objetivo enseñar de forma didáctica una serie de experimentos científicos que sorprenden en el campo de la luz. Específicamente, los chicos aprenderán a crear un arcoiris con mucho ingenio, a comprender cómo funciona el mecanismo de mando a distancia, a elaborar con un estuche de discos compactos una fotocopiadora, a crear un caleidoscopio o un periscopio, a mirar con atención en una cuchara como se distorsiona la luz reflejada en ella, entre otros. Así, con estos libros experimentas el mundo de la ciencia utilizando...

"Mauro se lleva bien con todos los animales del bosque, pero le gustaría tener un mejor amigo ..."--P. [4] of cover.

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Many desert animals around the world are in danger of becoming extinct. In this enlightening, Spanish-translated nonfiction title, readers will learn a few of the causes of extinction in the desert and what problems extinction causes for animals, wildlife, and humans alike. Through vibrant photos of beautiful animals and stunning facts in conjunction with informational text and useful charts and diagrams, readers will learn and understand concepts such as habit loss and learn ways that animal activists help to protect animals and their environments, as well as helpful tips to get involved in...