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.

El siglo XVIII (Ilustración, Neoclasicismo y Prerromanticismo): los ideólogos del siglo XVIII francés, la prosa francesa en el siglo XVIII, teatro y poesía en el XVIII francés, la prosa inglesa en el siglo XVIII, aparición de la novela moderna inglesa, el

¿Dónde se encuentra la vesícula biliar? ¿Cuánto mide el intestino? ¿Se dice úvula o paladar blando? ¿Qué hay dentro de la bóveda craneal? ¿Cómo está hecho un globo ocular? ¿Y para qué sirven los alvéolos? Entre células, órganos, aparatos y tejidos, un viaje al cuerpo humano, con el corazón y con el cerebro, contado con rigor científico y alegría narrativa. De la cabeza a los pies, con todo lo que se encuentra entre medias.

The skeletal system is made up of bones. They support and protect your body and help it work. Some bones help you run, or pick up a pencil; others protect organs, like the skull, which protects your brain. Learn about bones, joints and more in this informative book.

Describes How Animals Camouflage And Disguise Themselves In Order To Survive, Hunt, And Mimic Other Animals.