Cómo trolear en internet (Fixed Layout)

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

París. Año mil cuatrocientos. Robin, un muchacho, pasa a formar parte de una banda de maleantes que planea el robo del Santo Grial. El chico no se imagina que esta será la gran aventura que cambiará totalmente el curso de su vida. ¿Adónde le conducirá este apasionante peregrinaje? Una novela de aventuras en la que se muestra la necesidad de honestidad y ética.

This book introduces the reader to the nighttime world of the opossum, including its habitat, activities, diet, and the unique things that it does.

Why did the Civil War begin? Which states were part of the Union and which were part of the Confederacy? Readers will learn the answers to these questions and more as they move through this fascinating nonfiction Spanish-translated title. The easy-to-read informational text, engaging facts, and vivid images and illustrations help highlight some of the aspects that led up to the Civil War, including slavery, the Underground Railroad, abolitionists, the Fugitive Slave Act, the Dred Scott Decision, and the Lincoln-Douglas debates. The accessible table of contents works in conjunction with the...