Zombis, Fuerzas y Movimiento

Understanding light and color might seem impossible, but if readers already know the colors of the rainbow, they're part of the way there. Including the light spectrum, wavelengths, and other key concepts, this book tackles light and color for those falling behind in class because of their reading skills. The main text is written with these struggling readers in mind, accompanied by full-color photographs and diagrams to aid understanding. An extended glossary introduces and explains all the vocabulary readers need to continue learning about light and color.

Conocae Francisco. Nacido Jorge Mario Bergoglio en Buenos Aires, Argentina, Francisco es el primer Papa de las Amaericas. aEl es tambiaen el primer Papa para reemplazar uno de estar!

La vida puede volverse de pronto el peor circuito de carreras. Esa es la impresión que tienen Javier y Paula cuando descubren, con 15 años, que van a ser padres. A partir de ese momento, aunque los adultos de su entorno sean un apoyo, tendrán que ser ellos los que tomen sus propias decisiones.

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.