La Energía Solar (Solar Energy)

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.

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

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

Explores numbers and provides information about mathematical concepts including counting, adding, subtracting, and multiplying.

Describes what early planes and air travel were like, how planes were developed to travel faster, and presents some pioneers of aviation.

Técnico electricista 12 – Curso visual y práctico Luminotecnia En esta clase, describiremos los principios de la iluminación, explicaremos la importancia de un nivel correcto de iluminación, veremos las unidades que intervienen en el cálculo de iluminación y conoceremos las características de cada una de ellas. Describiremos los tipos de lámparas existentes, las características de las lámparas incandescentes, fluorescentes y de vapor. También analizaremos las ventajas de las lámparas dicroicas, bipín y halógenas. Continuaremos con las cualidades de los principales tipos de...

Journey through Earth's wet and wild rainforests with vivid photographs of the most unique plants and animals in the world's most untouched forests. Readers are introduced to the importance of protecting the rainforests and vocabulary related to the rainforest and its amazing inhabitants.