¿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.

La autora ha recogido las aventuras que Alberti le contó sobre su loro Cocorito, e incluye 22 láminas expresamente dibujadas para esta edición por el propio Alberti.

Está bien comprobado que, tal como dice Conrad, la misma violencia de un golpe de adversidad nos ayuda a soportarla, haciéndonos momentáneamente insensibles. Cuando la anestesia natural cede el paso al malestar, cada cual inventa un modo para poder sobrevivir a ese dolor. En Dime quién fui Elisa Rodríguez Court encuentra la provisional salvación en la literatura, fuente de experiencias que nos recuerdan en todo momento que el drama es de todos y que la vida, como cualquier libro, no pasa en realidad nunca de ser un proyecto. La desesperación de Dime quién fui es la desesperación de...

Simple text and photographs introduce the concept of symmetry as displayed by familiar creatures and objects.

You've only got one day to spend at the carnival-how do you make the most of your time? Students will learn how to measure time while reading about a fun-filled day at a carnival! This fiction Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The challenging practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of...