Our Dynamic Earth Guía Didáctica

!Atencion, magos, brujos, hechiceros, detectives, lunaticos, fanaticos y curiosos en general!: con este nuevo libro tendran la ocasion de poner a prueba el ingenio, el entusiasmo, la velocidad mental, la suerte, la imaginacion y otros poderes ocultos. La propuesta trae cuentos, cantos y 351 adivinanzas para seguir jugando con las palabras.

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.

"Los patios de juegos son lugares estupendos para jugar con tus amigos. Pero si no tienes cuidado, te puedes lastimar. Si sigues estas reglas de seguridad, te divertirás en todo tipo de patio de juegos." --From publisher's descripton.

Readers will set their eyes to the night sky in this fascinating book about astronomers. This volume is a perfect combination between STEM and career guidance as it introduces readers to the different ways astronomers use science, technology, engineering, and math in their work every day. Readers will love learning about celestial bodies and space phenomena, as well as the different processes and equipment astronomers use to observe, collect, and analyze data. This book also covers the steps a person can take to become an astronomer. The curriculum-based information in this book is conveyed...