Haciendo Formas

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Aislado por mar, desierto y cordillera, Chile es un lugar privilegiado por sus paisajes y pájaros sorprendentes. El libro que tienes en tus manos es una invitación a adentrarse en el mundo de las aves que habitan en el valle central de nuestro país, recorriendo su geografía desde la cordillera de los Andes hasta el mar. Este libro presenta a los PÁJAROS CHILENOS típicos de Chile Central y sus hábitats. A través de ilustraciones y diferentes relatos, te permitirá descubrir sus variadas características y comportamientos, y así explorar la forma de vida de nuestros compañeros...

A scientific look at how clouds are formed, why there are different types, and what you can tell about a cloud by looking at it.

Mathematics constitutes ideal material for exercising the art of learning and thinking. For this it is necessary that the classroom has a stimulating atmosphere which requires determined attitudes and beliefs. The book combines theory and practice and responds to questions such as these: to think in the mathematics class? on what does the knowledge of solving problems really consist of? what are the beliefs and which are the most common ones among the students? how to diagnose, evaluate and, in some cases to modify, the systems of beliefs of the pupil?).