La Energía Solar (Solar Energy)

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

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.

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

Mixtures And Solutions Exist Everywhere And Students Will Learn How Some Materials Mix Easily While Others Won't Mix At All. Gives Examples Students Can Use To Make A Physical Mixture And Gives Detailed Information On How Different Components Make Up Different Solutions.

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

Describes the life and work of the scientist who was persecuted by the Inquisition for his views of the universe.

Tailored to the 2013 IB Language B syllabus, our full-colour coursebook, Mañana, contains everything you need to succeed in your two-year Spanish B course. This coursebook prepares students for the 2013 Spanish Language B syllabus (first examination 2015), at both Standard and Higher Level. It is totally international, offering authentic materials from a variety of Spanish-speaking countries. The texts and topics have been chosen because of their intrinsic interest to young people, and to enable students to develop a genuine intercultural understanding. The exercises are carefully designed...