¿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.

Este libro tiene 40 páginas para colorear sin estrés, para reducir la frustración y mejorar la confianza. Este libro ayudará a los niños muy pequeños a desarrollar el control del lápiz y ejercitar sus habilidades motoras finas

Defines screws, explains their functions, and suggests simple experiments to demonstrate how they work.

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...

This book tells of several indigenous groups and what we know about their lives and customs based on archaeological discoveries and chronicles of the first Spaniards to encounter them. This title also contributes to the overall knowledge and understanding of these Mexican cultures, which play an important part in the history of the ancient world. Este libro cuenta cómo en Aridoamérica florecieron variados grupos indígenas. Lo que sabemos sobre su vida y sus costumbres es resultado de los descubrimientos arqueológicos y las crónicas de los primeros religiosos y militares españoles que...