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.

Si le gusta "One Fine Day" (Un día hermoso) ¿Por qué no las operas completas? ¿Qué tienen en común la "Sinfonía inacabada" de Schubert y la "Sinfonía de los Mil" de Mahler? ¿Es el jazz una forma de música de cámara? ¿Qué tiene de especial el piano? ¿Quién esta capacitado para dirigir? ¿Qué significa "en la tonalidad de D"? ¿A quién le gusta oir canciones en alemán? ¿Por qué la música rusa suena a rusa? ¿Necesita usted conocer un poco más a fondo lo que es una fuga, u otras formas musicales?. Este libro sin caer en el excesivo academicismo es una guía muy útil y...

Sofía and her friends accuse someone of theft based on his appearance, but when the truth comes out, they learn a lesson about passing judgment based on superficial traits.

Did you know that early explorers initially thought that California was an island? Learn how California was discovered with this Spanish book that focuses on the history of California. Students will learn about the contributions of Henry Hudson, Juan Rodriguez Cabrillo, Hernan Cortes, Francisco de Ulloa, and Sir Francis Drake. With a visually appealing layout, this primary source book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at their grade level. Packed with information and primary source maps, images, and ...

Learn how to help others in your community. This exciting Spanish nonfiction book describes the many ways that volunteers make a difference, from cleaning up parks to helping in food banks. Perfect for young readers, the book includes a short fiction stor