Exploremos el ciclo de la roca (Exploring the Rock Cycle)

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

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.

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.

Guía ilustrada de los cielos, los infiernos y las tierras de los muertos que han imaginado a lo largo de la historia las distintas culturas y religiones de todo el mundo: mapas, pinturas y relatos para realizar un fascinante recorrido por la geografía, la historia y los seres sobrenaturales que pueblan los distintos mundos del más allá. Ya se trate de los trece cielos aztecas, del inframundo taoísta chino de los "fantasmas hambrientos" o del "infierno del gallo llameante" de la mitología budista japonesa, se reúne una gran variedad de creencias y representaciones sobre la vida después ...

Charles Darwin es ya un hombre mundialmente famoso y polémico por su teoría sobre la evolución de las especies cuando, en 1865, decide escribir para sus hijos el relato del viaje que, con 23 años de edad, realizó alrededor del mundo a bordo del Beagle. Un viaje que cambiará su visión de la naturaleza y le hará comprender que todas las especies de plantas y animales están relacionadas y tienen un origen común. Durante cinco años, Darwin recorrió lugares llenos de contrastes, como la selva tropical de Brasil y la cordillera de los Andes, la Tierra del Fuego, las islas Galápagos......

Six titles in the illuminating Who Was . . . ? series are now available in Spanish-language editions. Each title features black-and-white illustrations.

Biographical And Science-Related Information Examining The Life Of Robert Fulton And His Invention Of The First Steamboat To Work Successfully.