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 agua es un espacio de juego extraordinario para los bebés y los niños que se servirán de él a su ritmo, en función de su personalidad y madurez y en el que se sentirán tranquilos y seguros en compañía de sus padres. La actividad acuática permite que los bebés experimenten todo un abanico de experiencias que contribuyen a facilitar la adaptación a diferentes situaciones, la aceptación de cambios de horario y de hábitos, la precocidad en el desarrollo motriz y la adquisición de la autonomía del niño. En este libro, la autora, transmite y comparte con el lector los...

En este cuaderno se estudian las grafías de los fonemas /z/, /g/, /j/, /k/, que volverás a ver en el cuaderno 4. También se estudian palabras muy usuales que comienzan con b.

The same fascinating content as Seymour Simon's AMAZING AIRCRAFT, thoughtfully translated into Spanish for use in the classroom or at home. Newly Updated 2012.

Surveys the life of the American statesman, lawmaker, writer of the Federalist Papers, and first secretary of treasury under George Washington.