Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

What keeps objects from floating out of your hand? What if your feet drifted away from the ground? What stops everything from floating into space? Gravity. As in his previous books, Redwoods, Coral Reefs, and Island, Jason Chin has taken a complex subject and made it brilliantly accessible to young readers in this unusual, innovative, and very beautiful book.

El libro se estructura en 5 bloques de contenido, cada uno de los cuales contiene varias Unidades hasta un total de 27. Cada Unidad se inicia con una página, que incluye:título de la unidad, foto motivadora, texto introductorio y contenidos que se desarrollarán en la unidad El desarrollo de cada Unidad se lleva a cabo dividiendo los contenidos en apartados y subapartados. Además, cada Unidad contiene otros elementos muy interesantes: actividades al final de los apartados, ejemplos resueltos al final de los apartados, curiosidades, datos, bibliografía y otros elementos que aparecen en los ...

Follows the adventures of Max Axiom as he explains the science behind forces and motion. Written in graphic-novel format.

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...