Trenes de Alta Velocidad (Bullet Trains)

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.

En esta crónica de la Segunda República, José María Gironella relata la vida de una familia de clase media, los Alvear, y a partir de aquí va profundizando en todos los aspectos de la vida ciudadana y de las diversas capas sociales. El lector asiste a lo largo de la obra al proceso en virtud del cual España fue dividiéndose en dos bandos irreconciliables hasta desembocar en la guerra civil.

This title explains what time is and the different kinds of ways, like seconds and hours, to measure it. It also gives everyday examples of things that have to do with time. Aligned to Common Core Standards and correlated to state standards. Abdo Kids Junior is an imprint of Abdo Kids, a division of ABDO. Translated by native Spanish speakers--and immersion school educators.

Explores Energy, How We Use It, Different Types And Forms, Conservation And Transformation Of Energy, Renewable Vs. Non-Renewable, And Energy Conservation.