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.

Tras años de estudio de los llamados misterios de nuestro mundo, el autor Pedro Silva decidió hacer una selección de una decena de hechos que a todos despiertan la mayor curiosidad. Su investigación se encaminó hacia el objetivo de proporcionar al lector las tan ansiadas respuestas a cuestiones tan seductoras como los misterios del Antiguo Egipto, las civilizaciones maya, azteca e inca o la relación que existe entre Lucifer y su diabólica compañera Lilith. El ensayista Pedro Silva va todavía más lejos, desvelando la noción de Paraíso existente en las más diversas culturas. Por...

Biography of Elizabeth Cady Stanton, a leader in the fight for women's right to vote in the United States.

Teaches Young Readers About Shapes And Patterns Using The Seasons Of The Year And Pictures Of Nature.

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