¿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.

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.

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.

Verdadero experto en feng shui �el arte de armonizar las construcciones humanas con el entorno natural—, el señor C.F. Wong es un caballero típicamente chino, es decir, discreto, formal, sabio y reservado. Afincado en Singapur, un compromiso profesional lo obliga a contratar como ayudante a Joyce, una chica extrovertida y desenvuelta que le provoca cierta irritación. No obstante, una extraña alquimia se produce entre Wong y Joyce, convirtiéndolos en una pareja de probada eficacia. Así, cuando el azar los lleva a resolver un crimen aplicando los preceptos del feng shui, el señor...

Robbery, gunfights, murder--outlaws ran rampant all across the Wild West! Readers will be introduced to some of the most famous robbers and outlaws of the Wild West in this enthralling, Spanish-translated nonfiction title. With vivid images, informational text, and incredible facts and stories about such well-known figures as Billy the Kid, Butch Cassidy, and Jesse James, readers will be engaged from cover to cover!

Simple text and photographs introduce the concept of "skip counting," or counting by groups of a certain number, and present items for practice.

Se le enseña cómo dibujar paisajes, animales, casitas, barquitos, y otras cosas usando bolitas, palitos, tiritas, tortillitas, etc.