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Why do some things heat up quickly while others don't? How can heat cause matter to change form from solid to liquid to gas and back again? Heat cannot be seen, but it can easily be felt. Looking at different objects' molecular makeup, this book describes the fundamentals of heat and furthers understanding through a series of easy experiments.

Esta novela, publicada en 1925, lanzó a Scott Fitzgerald al nivel de los clásicos, auténtico representante de los años dorados de una sociedad norteamericana que se desplomó con el crack del 29. Acumular riqueza para ocupar un lugar destacado en la sociedad es el motor de sus personajes, seres inconscientes que se mueven en un mundo vacío y artificial. Ésta es la historia del millonario hecho a sí mismo Jay Gatsby, a quien sólo le mueve una obsesión: recuperar un amor de juventud. This novel, published in 1925, launched Scott Fitzgerald at the level of the classics, an authentic...

Exploración espacial is one book in the Spanish-language Gran Atlas de la Ciencia series that covers today's most popular science topics, from digital TV to microchips to touchscreens and beyond. Perennial subjects in earth science, life science, and physical science are all explored in detail. Amazing graphics--more than 1,000 per title--combined with concise summaries help students understand complex subjects. Correlated to the science curriculum in grades 5-9, each title also contains a glossary with full definitions for vocabulary.

Why do we need food to live? Find out in this informative title that explains the importance of food to all living things.