Exploremos las rocas sedimentarias (Exploring Sedimentary Rocks)

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.

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.

Esta serie cuenta con un grupo de pequeños extraterrestres guardianes de la naturaleza que salen de su planeta en la búsqueda del mayor contaminador del universo, el perverso Zirt Zlunder. El se escapa y viene a vivir en el planeta Tierra. Este libro empieza, la saga de los Pequeños Guardianes alrededor del universo detrás del temible Zirt Zlunder, el mayor contaminador de todas las galaxias. Ellos le persiguen en un intento de detener a Zirt Zlunder antes de que llegue a Tierra para contaminar aún más nuestro planeta.

Animals sing or talk to communicate. They make noise for different reasons. Find out why some animals make certain noises. Paired to the fiction title So Many Classes.

Para los TROTAMUNDOS las Matemáticas son mucho más que números y problemas. Son un lenguaje universal que nos permite comunicarnos con los demás, una herramienta para apreciar la belleza de las múltiples formas que nos rodean, y , en definitiva, el camino para convertir el mundo en un lugar más justo y acogedor. ¿Te apuntas a mejorar tu mundo? ¡No puedes negarte!

Bajo este nombre escondió su prueba de amor a la belleza de la poesía esta chilena, ciudadana del mundo y amante de suprimir fronteras. Su inspirada lírica de sentimientos intensos la ha convertido en un símbolo para los anhelos ideales de todo el mundo latinoamericano. Premio Nobel 1945.