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

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.

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.

El profesor Eleazar Barajas es hijo mayor del Señor Alejandro Barajas Santoyo. Nació el 2 de junio de 1952 en Lombardía, Michoacán, México, Sus padres se divorciaron cuando tenía cinco años de edad y por esa causa, juntamente con su hermano menor, Israel Barajas, fueron puestos por su padre en el Internado de nombre Casa Hogar “El Buen Pastor” en la ciudad de Morelia, Michoacán, México. Cuando cumplió sus diecisiete años de vida, decidió estudiar en el Seminario y comenzó su carrera ministerial en el Instituto Bíblico de Puebla (Estado de Puebla, México) donde estudió por...

La vida de Eva, una muchacha de 12 años, sufre un giro dramático cuando su madre entra en coma por circunstancias desconocidas. Su padre, entonces, decide enviarla una temporada a la isla de El Hierro, con su abuelo, al que apenas ve. Allí no solo descubrirá los encantos y misterios de la zona, sus costumbres y sus gentes, sino que, ayudada por su nuevo amigo Jonay, vivirá una fantástica aventura en donde leyendas como la del Garoé juegan un papel esencial. El desafío de la leyenda es una estupenda novela de aventuras, llena de acción y misterio, que nos descubre los encantos y el...

When people think of soft things, they immediately conjure up images of furry bunnies and similarly textured animals and objects. This inviting book helps young readers to do the same, as learning about textures is an important tenet of the early elementary curriculum. Carefully selected photographs of soft objects make the concept of texture clear to the reader as well as aid in vocabulary acquisition.

Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.