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

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.

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

This book offers a tactile, interactive way to learn how to count to 20. Children are encouraged to trace the numbers with their fingers, find objects, and turn the wheel to reveal the correct number. It will help develop their fine motor skills as well as their powers of observation.

Most young astronomers know that Earth is located in the Milky Way galaxy, but they might not know what that means or what lies beyond. Understanding our galaxy and others will help them comprehend more about how the universe works. Your readers will discover many amazing and memorable facts about galaxies, including their differing shapes, numbers of stars, and constant movement. They'll especially love the mind-boggling images of the depths of space.

¿Qué es vida y dónde encontrarla? ¿Qué pasa cuando muere un idioma? ¿Podemos nosotros los humanos encontrar a Atlas hoy en nuestros días? En este libro se expone al lector a un elemento casi abandonado, la ética del mismo. Este libro no pretende ser más allá de lo que es, y llevará de la mano al lector hasta donde el lector este dispuesto a llevarse a si mismo a través de una reflexión a la ética de nuestros días desde la poesía.

Winter, spring, summer, and fall. Each season has its unique identifying features as well as its exciting activities. Readers will become well acquainted with these as they learn about the four seasons from this beneficial book. They'll also decide which is their favorite season. Thoughtfully chosen photographs correlate with the achievable text and illustrate the characteristics of each season.