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.

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.

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.

Menudo. "Hospital General. Les Miserables. Los Premios Grammy. "Livin' "La Vida Loca." Ha sido un largo camino para el actor y cantante Latino, pero el asegura que no cambiaria nada. Pasi de la locura de Menudo, a ser un actor y cantante en television y en los escenarios de Broadway. Con el estreno en Mayo de 1999 de su nuevo album en ingles (el cual incluye un duo con Madonna, una de sus mas grandes admiradoras), Ricky esta satisfecho son su gran exito. Con treinta fotografias, Ricky Martin: un album en palabras y fotografias es un retrato del talento de un jiven interprete. Lea la historia...

Suggested age: 8 years old. Words can be jigsaw puzzles. They can hide and yell safe. They can expand or shrink like the elastic cord used in recess to jump with. Words are ours: those that make us laugh, or make us think, and those that tell us it's time to play.

¿Dónde puedes encontrar el color azul? ¿Tiene algún significado especial este color? Los jóvenes lectores aprenderán a identificar objetos azules y los lugares donde aparecen en Azul, uno de los libros de Los niños y la ciencia: Colores. Where can you find the color blue? Does this color have any special meanings? Young readers will learn to identify blue objects and the places they appear in Blue, a Science Kids: Colors book.

Cuentos que relatan diferentes realidades de jóvenes de la misma edad en distintas zonas del planeta; y cuentos que retratan diferentes realidades de jóvenes en una zona tan común para todos ellos como puede ser el metro de Barcelona. Cuentos que harán reflexionar sobre la convivencia y sobre la necesidad de conseguir un mundo más justo.