Exploremos las rocas sedimentarias (Exploring Sedimentary Rocks)

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.

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

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.

Teach students about the life of Abigail Adams with this biography that has been translated into Spanish. Primary source documents and images will engage readers as they build their literacy skills and social studies content knowledge. This nonfiction book also encourages children to recognize someone who inspires them. Informational text features help students navigate the text.

En la mansión del conde Vázquez acaba de nacer un fantasma negro. La familia se lleva un tremendo disgusto porque un fantasma negro no se ve, y si no se ve, no asusta, y si no asusta, no le sirve de nada ser fantasma. ¿O sí? Cuando el resto de fantasmas está en apuros, el fantasma negro es el único que puede ayudarlos. "El fantasma negro" es una historia que nos habla de la diferencia con respeto, amor y mucho humor.

Con más de 50 millones de jugadores registrados, Minecraft se ha convertido en un auténtico fenómeno de masas. Sin duda, es el videojuego del momento. Esta guía, escrita por una gurú del Minecraft, te explica todos los trucos y técnicas que debes conocer para descubrir todas las posibilidades que ofrece el videojuego. ¡Nunca más volverás a encontrarte atrapado!

Children explore the concepts of big and small in the world around them, from big round pancakes to tiny little seashells.