¿Por qué hibernan los animales? (Why Animals Hibernate)

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.

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.

Fun and lovable illustrations offer encouragement and celebrate dreams for girls who know deep down they have what it takes to achieve anything they want.

Clara y Jorge acaban de mudarse a una urbanización porque la convivencia con los vecinos del edificio donde vivían era insoportable. Esperan que ahora todo sea diferente, pero arrastran un secreto oscuro del que no pueden librarse y, aunque sus nuevos vecinos los acogen con entusiasmo, pronto descubrirán cosas terribles de su pasado que abrirán una grieta insalvable entre ellos. Los perros siempre ladran al anochecer es un relato de suspense que se lee de un tirón y que al mismo tiempo arroja luz sobre la condición humana, las dudas que lastran la existencia y la dificultad de enterrar...

Henry Nelson, cantautor y msico colombiano, naci el 4 de diciembre en la ciudad de Armenia, Colombia. Viaj a la Argentina a la edad de 16 aos . Fue en ese pas, donde inicia su carrera artstica. Estudi msica por muchos aos. Vive en la Argentina desde hace ms de 50 aos. En sus inicios era integrante del tro TEQUENDAMA, cantando las canciones de esa poca, y en especial la msica mexicana. Su primer disco como solista es "Amarte es mi Alegra", en donde inclua el tema "Te dar un maana" por el cual le otorgaron el Disco de Oro por sus ventas en el Ecuador, fue el primer disco de Oro otorgado por ese ...

Ideal for English language learners, this Spanish-language series provides a lively first look at people and countries around the world. The simple text is supported by large, colorful photos. Titles feature an overview of each country's people, land, weather, homes, food, and lifestyle.