Energía del viento

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

Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

A force is a push, a pull, or a turn. Every force has an equal and opposite force. Forces are always with you! They are all around us. Learn about forces with this Spanish science reader that features easy-to-read text. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.

What do people and other living things need to survive? Numerous images with simple labels show children all the things we need to live and be happy, from water and food to shelter and love. An activity asks young readers to describe how they have fun.

Valentía de una voz indomable En un lenguaje coloquial, sin pretensiones, pero con la honestidad de quien abre su espíritu contestatario y vehemente en continua ebullición, Apolinar Beltrán Villazón nos presenta su primer libro de poesía, Raíces rojas, que busca abrirse espacio en las letras regionales desde su entorno cotidiano, desde su lucha permanente por lograr una expresión libre y de alto significado ético, que tiene la valentía de levantar su voz incorruptible e indomable, en medio de un territorio que, como él mismo lo señala en uno de sus textos, posee la doble...

Examines different kinds of relationships, discussing why they work and what to do when they do not work.