Cruzar un continente: Read-along ebook

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

On a clear night, you should be able to see the stars. But we cannot always see them. Light pollution prevents us from seeing the stars and causes other problems as well. Learn about light pollution with this STEAM book that will ignite a curiosity about STEAM topics through real-world examples. Created in collaboration with the Smithsonian Institution, it features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering design process. Make STEAM career connections with career advice from actual Smithsonian employees working in...

La vida de Alejandro García-Duran es intensa y desbordante. En estas páginas se pretende rescatar al Alejandro con conciencia social, al justo, al padre Alejandro de Las Arenas, al escolapio incómodo, al padrecito callejero, a Chinchachoma...Perfiles diversos que definen su apostolado. A lo largo de ocho capítulos que recorren la trayectoria vital en diversos escenarios geográficos, intentamos acercarnos al perfil de los callejeros y, finalmente, damos voz, a través de sus testimonios, a algunas de las personas que compartieron con él la difícil tarea de luchar por los niños y niñas ...

This guide gathers a selection of more than 500 species of vertebrate animals cataloged and arranged in colored illustration. It is an exhaustive and complete guide that provides precise information about each species, and that captures all the beauty and diversity of the vertebrate world in spectacular design and with enthralling visuals.