Los biocombustibles

El Mayflower es un barco que ha llegado a ser célebre en la historia de los Estados Unidos porque en 1620 transportó desde Inglaterra al grupo conocido como "los peregrinos", quienes serían los primeros colonos europeos en establecerse en Norteamérica. Ellos zarparon desde el puerto inglés de Southampton y bautizaron como Nueva Inglaterra a la tierra que los acogió. Como señala este libro, el Pacto del Mayflower designa el acuerdo que los hombres adultos de esta comunidad firmaron a bordo del barco para fijar criterios generales que sirvieran como fundamento para el gobierno de la...

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

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

Poems about being alone, love, fear, life, death and adults from a child's point of view. A boy wearing a tiger mask takes young readers on a journey of self-understanding and discovery.

En el transcurso de su vida monástica el P. Pedro fue escribiendo sus reflexiones sobre los Evangelios dominicales de los tres ciclos que actualmente celebramos en la liturgia. Fiel a su estilo coloquial, breve y conciso, sus meditaciones "jugosas", nos transmiten siempre un mensaje de esperanza, saliendo al encuentro de las preocupaciones de nuestro tiempo. Se suma la colaboración del P. Enrique que, a continuación del texto evangélico, enriquece el libro agregando algún aporte de los autores de los primeros siglos de la era cristiana.

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. They’ll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Don’t worry, they’ll be happy to learn that (hopefully) we have millions of years left!

Stephen F. Austin grew up to become known as the Father of Texas. Readers can learn about his interesting and incredible life in this appealing biography that has been translated into Spanish and highlights both Austin's life and Texas history. Through vivid images and illustrations, supportive text, an accommodating glossary and index, and fascinating facts, readers will learn about Texas pioneers, the empresario system, Freemasons, and how Austin became such an important figure in Texas history. This 6-Pack includes six copies of this title and a lesson plan.