Viaje al Sol (A Trip to the Sun)

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. Theyll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Dont worry, theyll be happy to learn that (hopefully) we have millions of years left!

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. They’ll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Don’t worry, they’ll be happy to learn that (hopefully) we have millions of years left!

Esta obra ha sido desarrollada para llevar los principales contenidos aeronáuticos a los entusiastas de la aviación, a los alumnos y futuros pilotos y a todo aquel apasionado del ámbito aeronáutico que desee aprender un poco mas de este fascinante mundo de la aviación civil. Aprenderemos los principales conceptos teóricos de la aviación. Un resumen de cada área aeronáutica, explicada de forma sencilla y agradable de leer, pero al mismo tiempo, desarrollando los contenidos mas relevantes de forma profesional y sumamente educativa. ¿Como son las pistas de los aeropuertos?,...

En Clima conocerás porqué unas veces hace sol y otras veces llueve, cómo surgen los rayos y los truenos, cómo se llaman los diferentes tipos de vientos y nubes que hay, quién sobrevivía a las glaciaciones... Y, finalmente, encontrarás unas preguntas que seguro que respondes con facilidad.

For thousands of years, militaries around the world were limited to male soldiers. However, throughout history, brave women have stepped out of the background and onto the battlefield. This biographical text covers the important women who’ve broken ground in the military. Famous historical figures such as Joan of Arc, Clara Barton, and Florence Nightingale are covered in depth, while the stories of modern-day heroes are presented to show how women are still affecting change on the front lines. A comprehensive timeline, fact boxes, and historical and modern images complete this...

Describes tornadoes, how they form, and the tools scientists use to predict them--in both English and Spanish