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 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.

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.

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Rina, Julia, Miriam, Sofía, Susy, Diana, Beatriz, Mary y Lili: nueve mujeres, nueve formas de entender el mundo. Las historias encadenadas que componen esta novela peinan a contrapelo la literatura hecha para mujeres a fi n de posicionarse como literatura hecha por mujeres. Por mujeres que en su día a día tiñen lo cotidiano con los tonos del amor, del desamor, de la pérdida, de la amistad, de la soledad, de la monotonía que se impone como marco salpicado con destellos de gracia. Y es que Margarita García Robayo hace de su escritura un instrumento capaz de rastrear en los detalles...

Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to page, what a fish is unfolds in vocabulary call-outs, insightful questions, and relatable...

El libro se estructura en 6 bloques de contenido, cada uno de los cuales contiene varias Unidades hasta un total de 17. Cada Unidad se inicia con una página, que incluye:título de la unidad, foto motivadora, texto introductorio y contenidos que se desarrollarán en la unidad El desarrollo de cada Unidad se lleva a cabo dividiendo los contenidos en apartados y subapartados. Además, cada Unidad contiene otros elementos muy interesantes: actividades al final de los apartados, ejemplos resueltos al final de los apartados, curiosidades, datos, bibliografía y otros elementos que aparecen en los ...