¿Foca o león marino? (Seal or Sea Lion?)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Provides an overview of the design, uses, weapons, and equipment of U.S. Navy submarines. Written in English and Spanish.

Los temas sobre la energía -producción, uso, impacto ambiental.- forman parte de nuestra vida cotidiana. Está presente en la prensa, en las cabeceras de los telediarios, en guiones cinematográficos o en la publicidad. Son contenidos vitales que no pueden esperar a la educación secundaria y su estudio debe abordarse desde los primeros niveles del sistema educativo. En este sentido este libro aporta ideas para la planificación y la puesta en práctica de actividades relacionadas con la energía, su uso, consumo y ahorro energético en la vida cotidiana. Se trata de propuestas y materiales ...

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...