¿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.

Esta obra, recoge once ensayos cuyo denominador común es el abordaje de pasajes de la historia intelectual del siglo XX mexicano. Por sus páginas, el lector verá transitar a multitud de intelectuales, desde Justo Sierra y Ezequiel Chávez hasta José Emilio Pacheco, pasando por Félix Palavicini, José Vasconcelos, Martín Luis Guzmán, Daniel Cosío Villegas y Carlos Fuentes, entre muchos más, con una atención especial en Alfonso Reyes y en la presencia de los intelectuales españoles exiliados en nuestro país a partir de finales de los años treinta. Su lectura llevará también al...

Trying to figure out a difficult math problem is hard, but sometimes dealing with your social life at school can be even harder. Figuring out friendships, managing time, and learning about yourself are all important parts of growing up. This title will allow students to determine the main idea of a text and explain how it is supported by key details; summarize the text.

Five and counting! So far, astronomers have discovered five dwarf planets in our solar system. Pluto, which was once thought of as the ninth planet, is today classified as a dwarf planet. This book looks at the current dwarf planets, characteristics, size, and orbital patterns, as well as the three rules scientists follow to characterize these tiny, round space objects. Every day new discoveries are being made. Who knows how many dwarf planets we will find in the future! This book will allow students to understand that patterns in the natural world can be observed, used to describe phenomena, ...

¿Qué es Dios? es el primer título de la serie más vendida de Etan Boritzer, para la educación del carácter y los valores sociales. Teniendo en cuenta que se trata de un tema muy complejo para los niños, el libro lo aborda desde una perspectiva de estudios comparativos, este libro anima a niños, padres y educadores a contemplar con tolerancia y respeto, la gran diversidad de religiones y creencias. Se explican brevemente cada una de las religiones más importantes, y se intenta expresar como todos estamos relacionados por una facultad universal, ¿Qué es Dios? es un manual útil,...