Trayectoria de choque: Los asteroides y la Tierra (Collision Course: Asteroids and Earth)

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

There are seven million horses in the United States! Early readers will learn all about horses and stallions in this appealing, Spanish-translated nonfiction title that features vibrant photos, captivating facts, and simple, informative text. With a picture glossary and helpful definitions, readers will discover there is much to learn as they move from cover to cover.

This Title Teaches Students That Everything Is Made Of Matter, And That Physical Changes Create Different Forms Or States Of Matter. Gives Examples Of These Different States In Easy To Understand Text And Introduces Students To The Law Of Conservation Of Mass.

Queridos amigos, Aprendí a leer desde muy niña buenas lecturas, cuando ya leía de “corrido" me nutrí en la biblioteca de mi abuelo, un militar ermitaño ya pensionado; mi imaginación también volaba oyendo los cuentos de las tertulias de antaño, que se daban en expresiones de admiración de temor, y de risas y cololoquios de familias pueblerinas. Hoy a mis años, las mezclas de entre los recuerdos y los sueños y en mi soledad la visita de alguno que otro fantasma que comparte conmigo amablemente lo que fueron sus vidas, me han abismado al mundo de la imaginación y de las letras, no...