La tierra y la importancia del agua

Basic concepts about electricity. Topics include: CA circuits, Serial and parallel circuits, transformers, power distribution and circuit repairs. With questionnaire. Ideal for high-school and college.

Read Along or Enhanced eBook: Did you know that most animals in the world don't have backbones? Learn more about invertebrates in this engaging, Spanish-translated nonfiction book. Readers will learn all about mollusks, arthropods, arachnids, and crustaceans while being stimulated from cover to cover with its detailed images and charts, intriguing facts, and informative text.

History is full of unsolved crimes, mysterious disappearances, and strange sightings. Readers will discover some of the most well-known mysteries in history--including Amelia Earhart, Big Foot, and the Salem Witch Trials--in this fascinating, Spanish-translated nonfiction book. Featuring detailed images, intriguing facts, and informational text in conjunction with a glossary of terms and an index, readers will be enthralled from beginning to end! This 6-Pack includes six copies of this title and a lesson plan.

EL LIBRO DE LOS HECHOS INSÓLITOS reúne más de 1.500 noticias que integran un verdadero festín para el curioso. Estructurada atendiendo a distintas y variopintas áreas y dotada de un útil índice temático y onomástico, la presente obra de GREGORIO DOVAL recoge desde sucintas biografías de personajes extraordinarios (la Monja Alférez, Billy el Niño, el marqués de Sade ) e historias de descubrimientos, pérdidas y predicciones, hasta ingeniosas invenciones de productos cotidianos que van del perrito caliente al crucigrama, la razón y ocasiones en que han sucedido episodios tan fuera ...