Cómo podemos utilizar el tornillo?

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

Solar Energy Is Explained. Included In This Book Is Where It Comes From, Who Uses It, And The Positive And Negative Benefits Of Using It. Correlated To Common Core, Texas TEKS, Virginia Sols, And Georgia Performance Standards.

Follows the Thirteen the Amendment that freed the slaves, end of the war, and the death of President Abraham Lincoln.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

Learn about some animals that are in danger of becoming extinct and what people are doing to Save the Animals.

The asteroid belt between Mars and Jupiter is an intriguing area of our solar system. Scientists have counted over 670,000 known asteroids there, but there could be millions more not yet found. Readers will discover much more about the asteroid belt in this highinterest book, which blends science and math. They'll read about several topics, such as space missions to the asteroid belt and the difference between an asteroid and a planet, and solve associated math problems-just like actual space scientists do!

A compendium of fascinating facts about more than 100 different animals, this educational trivia book answers questions such as What purpose does a pelican's pouch serve? Which animals carry their young in a pouch? and Are electric eels really dangerous? Un compendio de hechos fascinantes sobre m�s de 100 animales diferentes, este libro de trivialidades contesta preguntas como �Qu� prop�sito tiene la bolsa del pelicano? �Cu�les animales llevan a sus cr�as en una bolsa abdominal? y �Son las anguilas el�ctricas peligrosas?

Cuentos cortos sobre el mundo real con los que aprenderás y te harán soñar de la mano de la prestigiosa Enciclopedia Británica. ¿Por qué dormimos? ¿Cómo hacen los tiburones para dar cabezaditas bajo el agua? ¿Cuál es la cama más cara del mundo? Encontrarás las respuestas a estas y otras muchas preguntas en esta recopilación de historias reales para leer en cinco minutos. Prepárate para viajar al antiguo Egipto y examinar las camas de Tutankamón, volar al espacio y ver cómo los astronautas se preparan para acostarse, o sumergirte en el agua para descubrir que, cuando hibernan,...