Exploremos las rocas sedimentarias (Exploring Sedimentary Rocks)

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.

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 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.

Este es un libro para nios, sobre un oso que...¡sólo comía chocolate! No comía vegetales ni ninguna fruta. Sólo comía chocolate. El oso no comía arroz. Tampoco comía cereales. Nunca nadie podría llegar a verlo comiendo yogur o algo, que todos podríamos llamar...saludable. Sólo le gustaba el chocolate. Por supuesto, mucha cantidad de algo "bueno" a menudo es malo, y llevar una dieta no balanceada no ayudaría al oso a crecer y ser fuerte y grande. Mucho amor por el chocolate inclusive podría hacer que el oso se metiera en problemas. Cuando se le termina el chocolate y a sus amigos...

Un libro con ejercicios de conversación para las clases. Los profesores de español encontrarán en él una fuente de inspiración y multitud de ejercicios para sus clases. El libro incluye, entre otras cosas: · Situaciones de rol en el trabajo, con la familia y con amigos. · Debates. · Tarjetas con preguntas. · Imágenes para describir. · Ejercicios de exámenes oficiales. · Juegos de rol. Más de 150 páginas con ejercicios para todos los niveles que los profesores podrán usar en sus clases de conversación. Sin duda, este manual ayudará a mejorar la expresión oral de los...

During the 20th century, Texas grew from a land of farms and ranches to a state filled with large cities and industries. This fascinating title is a great introduction to Texas history, Texas social life and customs, and Texas economic conditions throughout the 20th century. The intriguing facts and vivid images work in conjunction with the supportive text and accommodating glossary and index to give children an opportunity to enhance their vocabulary and literacy skills while learning about the exciting history of Texas! This book has been translated into Spanish.

"Discusses the role of the oceans on Earth and introduces waves, tides, and water pressure"--Provided by publisher.