Valores sociales

Examines the nature of human rights, including the gradual development of the idea that all people, regardless of gender, color, or wealth, are citizens with rights, not just subjects with duties, and discusses the growth of social rights and the case against torture.

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

¡Ñee! ¡Hola, gente! ¡Soy Pacheco Cara Floja! Y en este nuevo libro quiero contaros cómo salvé la Tierra de una gran amenaza intergaláctica... Todo empezó cuando maté a aquel mosquito molesto de un golpe de remo. Bueno, el caso es que no era un mosquito, era un ser de otro planeta... ¡Qué demonios! ¿Cómo iba yo a saber que por haber acabado con ese bicho fastidioso una panda de alienígenas se iban a enfadar tanto? La única forma de salvar al planeta Tierra de la destrucción es viajar a Proteus y donar una muestra de mi ADN. Pero... ¿qué es lo que oculta Kran, el temible...

I Like to Paint Spanish Edition. When you paint a picture, you can choose the best paint to use. What would you use to paint an elephant? What would you paint with pink or purple?

Life on Earth depends on carbon. In fact, about 18.5 percent of a human body's mass is carbon. How carbon is taking in and given off through animals' breathing, the burning of fossil fuels, and more can be shown in the model known as the carbon cycle. Though this concept can be confusing, all readers have a chance to understand this concept through the text and simple diagrams in this book. Both struggling readers and those looking for review can find the most important components and vocabulary of the carbon cycle in low-level, accessible text.