Un día de trabajo de un astrónomo (A Day at Work with an Astronomer)

Learn about the rich history of Mission Santa Inés: how it started, the people who ran it, the indigenous population, and its legacy today.

El poderoso tridente del rey Tritón ha traspasado la barrera mágica que mantiene a los villanos encerrados en la Isla de los Perdidos. Aprovechando la ocasión, la eterna rival de Mal, Uma, hija de Úrsula, la bruja del mar, se ha propuesto adueñarse del preciado objeto y ha reunido una tripulación pirata junto a Harry, hijo del capitán Garfio, y Gil, hijo de Gastón. Mientras tanto, una tormenta se cierne sobre Áuradon. Cuando Mal, Evie, Carlos y Jay descubren que el tridente ha desaparecido, saben que tienen que hacer cualquier cosa por recuperarlo antes de que caiga en las manos de...

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Mars is perhaps the most thrilling planet these days. With rovers exploring its surface and manned missions in the works, people are wondering if Mars is our next home! In this highinterest book, readers will learn more about Earth's neighbor, including what its climate and surface are like, why it's called the Red Planet, and about the recent discovery of water on its surface. They'll learn all this while solving "Your Mission" math problems that complement and support the text. This motivating volume is an engaging way to explore key aspects of science and math curricula.